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COT practice questions

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Question 1Ophthalmic patient care and clinical assisting

Which instrument is used to measure intraocular pressure by applanating the cornea after instilling a topical anesthetic and fluorescein?

  1. Goldmann tonometer Correct answer.
  2. Lensometer
  3. Pachymeter
  4. Keratometer

Explanation

The Goldmann applanation tonometer flattens a fixed corneal area and measures the force required, giving intraocular pressure in mmHg. It requires corneal anesthesia and fluorescein to visualize the mires.

Question 2Ophthalmic patient care and clinical assisting

A patient is scheduled for fluorescein angiography. Which pre-procedure question is most important for the ophthalmic assistant to ask?

  1. Whether the patient has ever had cataract surgery
  2. Whether the patient has a known allergy to iodine, shellfish, or prior fluorescein dye Correct answer.
  3. Whether the patient wears glasses or contact lenses
  4. Whether the patient has a family history of glaucoma

Explanation

Fluorescein contains iodine, so documented iodine or prior dye reactions raise the risk of an adverse response and must be reported before injection. Contact lens use, cataract history, and family glaucoma history do not predict acute dye reactions.

Question 3Ophthalmic patient care and clinical assisting

What is the primary purpose of dilating a patient's pupils before a fundus examination?

  1. To measure refractive error more accurately
  2. To lower intraocular pressure during the visit
  3. To improve visualization of the retina and optic nerve Correct answer.
  4. To anesthetize the corneal surface

Explanation

Mydriatic drops enlarge the pupil so the clinician can inspect the peripheral retina, macula, and optic nerve. They do not reduce pressure, numb the cornea, or refine refraction.

Question 4Ophthalmic patient care and clinical assisting

Which topical drop is instilled to anesthetize the cornea before tonometry or foreign body removal?

  1. Tropicamide
  2. Pilocarpine
  3. Timolol
  4. Proparacaine Correct answer.

Explanation

Proparacaine is a rapid-onset topical anesthetic used for brief corneal procedures. Tropicamide dilates, pilocarpine constricts, and timolol lowers pressure.

Question 5Ophthalmic patient care and clinical assisting

When performing a visual acuity test with a Snellen chart, at what distance is the patient typically positioned?

  1. 5 feet (1.5 meters)
  2. 10 feet (3 meters)
  3. 20 feet (6 meters) Correct answer.
  4. 40 feet (12 meters)

Explanation

Standard Snellen acuity is recorded at 20 feet, equivalent to 6 meters in metric notation. This distance is the reference for the 20/20 fraction.

Question 6Ophthalmic patient care and clinical assisting

A patient reports sudden floaters and flashes of light. Which action by the ophthalmic assistant is most appropriate?

  1. Document the complaint and continue with the scheduled refraction
  2. Instill artificial tears and send the patient home
  3. Notify the ophthalmologist promptly for a dilated fundus examination Correct answer.
  4. Schedule a routine appointment in three months

Explanation

Flashes and new floaters can signal a retinal tear or detachment, which is an urgent finding requiring prompt dilated examination. Delaying evaluation risks permanent vision loss.

Question 7Ophthalmic patient care and clinical assisting

Which disinfectant is commonly used to clean applanation tonometer prisms between patients?

  1. Soap and water
  2. Hydrogen peroxide 3%
  3. Chlorhexidine gluconate
  4. 70% isopropyl alcohol Correct answer.

Explanation

Seventy percent isopropyl alcohol is a standard, rapid-acting wipe for tonometer prisms and dries quickly without residue. Chlorhexidine can be toxic to the cornea, and soap leaves residue.

Question 8Ophthalmic patient care and clinical assisting

What is the correct way to store a trial lens set to protect optical quality?

  1. In its case with lenses kept free of dust and fingerprints Correct answer.
  2. Immersed in alcohol between uses
  3. Loose in a drawer with other instruments
  4. Stacked directly against each other

Explanation

Trial lenses should remain in their fitted case and be handled by the rim to prevent scratches and contamination. Loose storage or stacking risks surface damage that alters refraction results.

Question 9Ophthalmic patient care and clinical assisting

A patient's pupils are dilated with tropicamide. Which instruction should the assistant give before the patient leaves?

  1. Expect permanent pupil enlargement
  2. Return immediately if the pupils remain large at bedtime
  3. Avoid all fluids for six hours
  4. Expect blurry near vision and light sensitivity for several hours and wear sunglasses outdoors Correct answer.

Explanation

Tropicamide causes temporary cycloplegia and mydriasis, producing near blur and photophobia until it wears off. Sunglasses help with light sensitivity, and the effects are transient, not permanent.

Question 10Ophthalmic patient care and clinical assisting

During Goldmann tonometry, the mires are too wide and overlapping. What does this most likely indicate?

  1. The prism is completely dry
  2. The tonometer is turned off
  3. The patient has a corneal abrasion
  4. Excessive fluorescein or tear film thickness altering the reading Correct answer.

Explanation

Wide, thick mires usually reflect too much fluorescein or a thick tear film, which falsely elevates the measured pressure. Reducing dye and drying the prism slightly improves accuracy.

Question 11Ophthalmic patient care and clinical assisting

An assistant is performing a confrontation visual field test. Which technique is correct?

  1. The patient stares at a moving penlight in a dark room
  2. The examiner faces the patient at about one meter and brings a target inward from the periphery in each quadrant Correct answer.
  3. The examiner stands behind the patient and flashes a light
  4. The patient covers both eyes and reads a chart

Explanation

Confrontation testing compares the examiner's field with the patient's by moving a target from the periphery toward fixation in each quadrant while the patient covers one eye. This screens for gross visual field defects.

Question 12Ophthalmic patient care and clinical assisting

A soft contact lens is being removed with a suction cup. What is the most appropriate precaution?

  1. Press the cup firmly against the cornea to grip the lens
  2. Center the cup on the lens and pull gently away from the cornea Correct answer.
  3. Apply the cup to the sclera instead of the lens
  4. Slide the lens toward the canthus before lifting

Explanation

The suction cup should be centered on the lens and drawn gently outward to avoid corneal trauma. Pressing on the cornea or misplacing the cup risks injury.

Question 13Ophthalmic patient care and clinical assisting

Which finding on a patient's chart should prompt the assistant to check for a history of narrow angles before instilling a dilating drop?

  1. Shallow anterior chamber noted on prior examination Correct answer.
  2. Previous LASIK
  3. Family history of cataract
  4. High myopia

Explanation

A shallow anterior chamber suggests a narrow angle, which carries a risk of angle-closure after dilation. High myopia, prior LASIK, and family cataract history do not carry the same acute risk.

Question 14Ophthalmic patient care and clinical assisting

What is the primary reason for performing a pachymetry measurement before interpreting tonometry results?

  1. Corneal thickness affects the accuracy of applanation pressure readings Correct answer.
  2. It assesses tear production
  3. It measures the axial length of the eye
  4. It determines the refractive error

Explanation

Thin or thick corneas can bias applanation readings, so central corneal thickness helps the clinician interpret intraocular pressure. It does not measure axial length, refraction, or tear production.

Question 15Ophthalmic patient care and clinical assisting

A patient is scheduled for an A-scan biometry measurement before cataract surgery. What should the assistant confirm?

  1. The patient has not worn rigid contact lenses recently and can cooperate with fixation Correct answer.
  2. The patient has fasted for twelve hours
  3. The patient has removed all jewelry
  4. The patient has received a dilating drop

Explanation

Accurate axial length measurement requires corneal stability, so recent rigid lens wear should be reported, and the patient must fixate on the target. Fasting, dilation, and jewelry removal are unrelated to biometry.

Question 16Ophthalmic patient care and clinical assisting

Which action best prevents cross-contamination when using a Schirmer test strip?

  1. Handle the strip by its notched end and discard it after use Correct answer.
  2. Reuse the strip for the fellow eye
  3. Store used strips in the case for later review
  4. Touch the strip tip with bare fingers before insertion

Explanation

Handling the strip by the notched end avoids touching the portion that contacts the eye, and single use prevents transmission of organisms. Reuse or bare-finger contact risks contamination.

Question 17Ophthalmic patient care and clinical assisting

A patient's visual acuity is recorded as 20/40. What does this mean?

  1. The patient can read the 20-foot line from 40 feet away
  2. The patient needs a 40-diopter lens
  3. The patient sees at 20 feet what a person with normal acuity sees at 40 feet Correct answer.
  4. The patient's acuity is 40 percent of normal

Explanation

The 20/40 notation means the patient identifies at 20 feet a letter size that a standard observer identifies at 40 feet. It is not a percentage of normal or a lens power.

Question 18Ophthalmic patient care and clinical assisting

Which test assesses color vision using a series of plates with embedded numbers or patterns?

  1. Amsler grid
  2. Contrast sensitivity chart
  3. Ishihara plates Correct answer.
  4. Stereopsis test

Explanation

Ishihara plates screen for red-green color deficiency using pseudoisochromatic designs. The Amsler grid assesses macular distortion, not color discrimination.

Question 19Ophthalmic patient care and clinical assisting

An assistant notices that a patient's blood pressure is 190/110 mmHg during a preoperative visit. What is the most appropriate response?

  1. Advise the patient to reduce salt intake and proceed
  2. Recheck at the next annual visit
  3. Record the value and continue without comment
  4. Notify the ophthalmologist before proceeding with the scheduled procedure Correct answer.

Explanation

A markedly elevated blood pressure warrants prompt notification of the physician, who decides whether to proceed or refer for medical evaluation. Silently continuing or deferring to a future visit ignores a potentially urgent finding.

Question 20Ophthalmic patient care and clinical assisting

Which factor most affects the reliability of a manifest refraction in a patient who has just used a computer for several hours?

  1. Accommodative fatigue altering the endpoint Correct answer.
  2. Elevated intraocular pressure
  3. Reduced tear film pH
  4. Increased corneal thickness

Explanation

Prolonged near work can cause accommodative fatigue and instability, making the refraction endpoint unreliable. Corneal thickness, pressure, and tear pH are not the primary determinants of refractive stability.

Question 21Ophthalmic patient care and clinical assisting

A patient with a known latex allergy is scheduled for a procedure. Which precaution is most appropriate?

  1. Apply a topical antihistamine before the procedure
  2. Use latex-free gloves and equipment and inform the clinical team Correct answer.
  3. Double-glove with standard latex gloves
  4. Proceed as usual because the allergy is mild

Explanation

Latex-allergic patients require latex-free gloves, tourniquets, and equipment to prevent a hypersensitivity reaction, and the team must be informed. Double-gloving with latex does not eliminate exposure.

Question 22Ophthalmic patient care and clinical assisting

During a dilated fundus examination, the assistant notes sudden patient restlessness, sweating, and a drop in responsiveness. Which action should be taken first?

  1. Stop the examination and assess the patient while notifying the ophthalmologist Correct answer.
  2. Instill another dilating drop
  3. Continue the examination and document the symptoms afterward
  4. Ask the patient to read the acuity chart

Explanation

Acute restlessness, diaphoresis, and reduced responsiveness may signal a vasovagal or systemic reaction, so the examination should stop and the physician notified while the patient is assessed. Continuing or adding drops delays necessary care.

Question 23Ophthalmic patient care and clinical assisting

A patient reports a metallic taste and nausea shortly after intravenous fluorescein injection. What is the most likely explanation?

  1. A sign of retinal detachment
  2. Evidence that the dye was injected into the eye
  3. Immediate anaphylaxis requiring epinephrine
  4. A common transient reaction to the dye that usually resolves without treatment Correct answer.

Explanation

Mild nausea and a metallic taste are recognized transient effects of fluorescein injection and generally resolve spontaneously. They do not indicate anaphylaxis or retinal pathology.

Question 24Ophthalmic patient care and clinical assisting

A patient with a rigid gas-permeable lens presents for keratometry. Why should the assistant ask when the lens was last worn?

  1. Rigid lenses permanently change the axial length
  2. Rigid lenses prevent the keratometer from focusing
  3. Rigid lenses can temporarily alter corneal curvature and distort measurements Correct answer.
  4. Rigid lenses increase corneal thickness indefinitely

Explanation

Rigid lens wear can warp or flatten the cornea temporarily, producing inaccurate keratometry and refraction values. Measurements are typically deferred until the cornea stabilizes after lens removal.

Question 25Ophthalmic patient care and clinical assisting

An assistant is calibrating a non-contact tonometer and finds readings consistently lower than a reference Goldmann value. What is the most appropriate interpretation?

  1. The instrument may need recalibration or servicing before clinical use Correct answer.
  2. The Goldmann tonometer must be faulty
  3. The discrepancy can be ignored because devices never agree
  4. The patient's pressure has fallen

Explanation

A consistent offset from a reference standard suggests calibration drift, so the device should be checked and serviced before use. Assuming the reference device is faulty or ignoring the discrepancy risks inaccurate pressure readings.

Question 26Ophthalmic patient care and clinical assisting

An ophthalmic assistant is preparing a patient for a slit-lamp examination. Which action best minimizes the risk of transferring microorganisms from the chin rest to the patient?

  1. Having the patient hold their breath during the examination
  2. Wiping the chin rest with a dry tissue after each patient
  3. Spraying the chin rest with sterile saline before use
  4. Placing a fresh tissue or disposable cover on the chin rest for each patient Correct answer.

Explanation

Barrier protection with a disposable tissue or cover prevents direct contact between the patient's skin and the shared chin rest, reducing cross-contamination. Dry tissue alone may not provide a barrier and can spread debris. Saline is not a disinfectant and does not clean the surface.

Question 27Ophthalmic patient care and clinical assisting

Which instrument is used to measure intraocular pressure by applanating the cornea with a controlled force?

  1. Tonometer Correct answer.
  2. Keratometer
  3. Retinoscope
  4. Ophthalmoscope

Explanation

A tonometer measures intraocular pressure; applanation tonometry flattens a fixed area of the cornea to estimate pressure. A keratometer measures corneal curvature, an ophthalmoscope views the fundus, and a retinoscope assesses refractive error.

Question 28Ophthalmic patient care and clinical assisting

A patient is scheduled for Goldmann applanation tonometry. Which topical agent is commonly instilled to anesthetize the cornea before the measurement?

  1. Proparacaine 0.5% Correct answer.
  2. Pilocarpine 2%
  3. Tropicamide 1%
  4. Fluorescein sodium 2%

Explanation

Proparacaine is a rapid-onset topical anesthetic used to numb the cornea for tonometry. Tropicamide is a mydriatic, pilocarpine is a miotic, and fluorescein stains the tear film but does not anesthetize.

Question 29Ophthalmic patient care and clinical assisting

When performing a visual acuity test with a Snellen chart, what is the standard testing distance for a patient with normal vision?

  1. 10 feet
  2. 20 feet Correct answer.
  3. 40 centimeters
  4. 6 meters

Explanation

The Snellen chart is standardized for a 20-foot testing distance; 6 meters is the metric equivalent but the question asks for the standard distance in feet. Ten feet and 40 centimeters are used for near or special charts, not the standard Snellen distance.

Question 30Ophthalmic patient care and clinical assisting

An ophthalmic assistant is instilling eye drops into a patient's eye. Which technique is correct to minimize contamination of the bottle?

  1. Aim the drop directly at the center of the cornea from a distance
  2. Touch the dropper tip to the conjunctiva to ensure the drop is delivered
  3. Rinse the dropper tip with tap water after each use
  4. Hold the dropper tip close to the eye without touching the ocular surface Correct answer.

Explanation

The dropper tip should never contact the eye or eyelid; holding it close without touching prevents contamination of the bottle and injury to the ocular surface. Touching the tip to the conjunctiva introduces microorganisms, and tap water is not sterile.

Question 31Ophthalmic patient care and clinical assisting

Which color vision test uses a series of plates with embedded numbers or patterns to screen for red-green deficiencies?

  1. Amsler grid
  2. Humphrey visual field test
  3. Contrast sensitivity test
  4. Ishihara test Correct answer.

Explanation

The Ishihara test consists of pseudoisochromatic plates with numbers or patterns embedded in colored dots to detect red-green color vision defects. The Amsler grid assesses central visual field distortion, contrast sensitivity measures contrast detection, and the Humphrey test maps the visual field.

Question 32Ophthalmic patient care and clinical assisting

A patient is being prepared for a dilated fundus examination. Which medication is commonly used to dilate the pupil?

  1. Tropicamide 1% Correct answer.
  2. Timolol 0.5%
  3. Proparacaine 0.5%
  4. Pilocarpine 1%

Explanation

Tropicamide is an anticholinergic mydriatic used to dilate the pupil for fundus examination. Pilocarpine constricts the pupil, timolol lowers intraocular pressure without significant dilation, and proparacaine anesthetizes the cornea.

Question 33Ophthalmic patient care and clinical assisting

What is the primary purpose of performing pachymetry before interpreting intraocular pressure measurements?

  1. To evaluate the health of the optic nerve
  2. To assess the refractive error of the eye
  3. To measure corneal thickness, which affects the accuracy of tonometry Correct answer.
  4. To determine the patient's tear production

Explanation

Pachymetry measures central corneal thickness; thicker corneas tend to give higher tonometry readings and thinner corneas lower readings, so thickness must be considered when interpreting intraocular pressure. It does not measure refractive error, optic nerve health, or tear production.

Question 34Ophthalmic patient care and clinical assisting

An ophthalmic assistant is performing a confrontation visual field test. Which technique is correct?

  1. The examiner uses a perimeter to map the visual field automatically
  2. The examiner asks the patient to read letters from a chart at 20 feet
  3. The examiner stands behind the patient and asks the patient to look straight ahead while the examiner moves a target from the periphery toward the center
  4. The examiner stands in front of the patient and asks the patient to close one eye while the examiner moves a target from the periphery toward the center Correct answer.

Explanation

Confrontation testing compares the patient's peripheral vision with the examiner's by moving a target from the periphery toward the center while the patient fixes on the examiner's nose with one eye covered. Standing behind the patient is incorrect, and automated perimetry and visual acuity charts are different tests.

Question 35Ophthalmic patient care and clinical assisting

A patient is scheduled for an A-scan biometry measurement before cataract surgery. What should the assistant confirm before the measurement?

  1. That the patient has received a topical anesthetic
  2. That the patient has fasted for at least 12 hours
  3. That the patient's pupils are fully dilated
  4. That the patient has not worn contact lenses for the recommended period Correct answer.

Explanation

Contact lens wear can alter corneal curvature and affect biometry readings, so the assistant should confirm that the patient has discontinued lens wear for the recommended period. Fasting, pupil dilation, and topical anesthesia are not standard requirements for A-scan biometry.

Question 36Ophthalmic patient care and clinical assisting

During a dilated fundus examination, the assistant notes sudden patient restlessness, sweating, and a drop in responsiveness. What is the most appropriate initial action?

  1. Instill additional dilating drops
  2. Continue the examination and document the findings
  3. Stop the examination and assess the patient's vital signs and airway Correct answer.
  4. Ask the patient to sit quietly until the examination is finished

Explanation

Sudden restlessness, sweating, and decreased responsiveness may indicate a vasovagal reaction, hypoglycemia, or another medical emergency; the examination should stop and the patient assessed. Continuing, instilling more drops, or simply waiting could worsen the situation.

Question 37Ophthalmic patient care and clinical assisting

An assistant is calibrating a non-contact tonometer and finds readings consistently lower than a reference Goldmann value. What is the most appropriate action?

  1. Refer the patient for immediate surgery
  2. Repeat the measurement on the patient's other eye
  3. Adjust the calibration according to the manufacturer's instructions and recheck Correct answer.
  4. Ignore the difference because non-contact tonometers are always lower

Explanation

A consistent discrepancy suggests the instrument needs calibration; the assistant should follow the manufacturer's calibration procedure and verify with a reference. Ignoring the difference, repeating on the other eye, or referring for surgery does not address the instrument problem.

Question 38Ophthalmic patient care and clinical assisting

A patient is scheduled for a Schirmer test. How should the assistant prepare the patient?

  1. Instill a topical anesthetic and place the strip in the lower cul-de-sac Correct answer.
  2. Ask the patient to blink rapidly during the test
  3. Have the patient rinse the eyes with saline before the test
  4. Place the strip on the cornea for 5 minutes

Explanation

For a Schirmer test, a topical anesthetic is often instilled and a sterile strip placed in the lower cul-de-sac without touching the cornea; the patient keeps the eyes gently closed. Rapid blinking, corneal placement, and saline rinsing are incorrect.

Question 39Ophthalmic patient care and clinical assisting

An assistant is performing a manifest refraction on a patient who has just used a computer for several hours. Which factor most affects the reliability of the result?

  1. Intraocular pressure
  2. Pupil color
  3. Accommodative fatigue Correct answer.
  4. Corneal thickness

Explanation

Prolonged near work can cause accommodative fatigue or spasm, leading to variable and unreliable refraction results. Corneal thickness, intraocular pressure, and pupil color do not directly affect manifest refraction.

Question 40Ophthalmic patient care and clinical assisting

A patient reports sudden loss of vision in one eye. Which action should the ophthalmic assistant take first?

  1. Reassure the patient that it will resolve on its own
  2. Notify the ophthalmologist immediately for emergency evaluation Correct answer.
  3. Schedule a routine appointment for the next available slot
  4. Perform a refraction and order new glasses

Explanation

Sudden vision loss may indicate a retinal artery occlusion, vitreous hemorrhage, or other emergency requiring immediate evaluation. Scheduling routinely, refracting, or reassuring delays potentially sight-saving treatment.

Question 41Ophthalmic patient care and clinical assisting

An assistant is preparing to perform a corneal scrape for a suspected bacterial keratitis. Which action is most important to prevent contamination of the specimen?

  1. Use a sterile spatula and immediately inoculate the culture medium Correct answer.
  2. Collect the specimen after applying topical antibiotic
  3. Instill fluorescein before collecting the specimen
  4. Collect the specimen with a cotton swab and store it dry

Explanation

A corneal scrape should be obtained with a sterile instrument and inoculated directly onto culture media to preserve organism viability and prevent contamination. Cotton swabs may absorb organisms, fluorescein can interfere with culture, and antibiotics can reduce yield.

Question 42Ophthalmic patient care and clinical assisting

A patient with a history of angle-closure glaucoma is scheduled for a dilated fundus examination. Which action is most appropriate?

  1. Cancel the examination and schedule a different test
  2. Proceed with dilation using a short-acting agent without consulting the ophthalmologist
  3. Instill a long-acting dilating agent to minimize repeat dosing
  4. Consult the ophthalmologist before instilling any dilating drops Correct answer.

Explanation

Patients with angle-closure glaucoma are at risk of acute angle-closure with dilation, so the ophthalmologist should be consulted before any dilating drops are used. Proceeding without consultation, using a long-acting agent, or canceling without discussion is inappropriate.

Question 43Ophthalmic patient care and clinical assisting

An ophthalmic assistant is reviewing a patient's medication list before fluorescein angiography. Which medication class is most important to identify because of a potential interaction with fluorescein?

  1. Beta-blockers Correct answer.
  2. Diuretics
  3. Antihistamines
  4. Anticoagulants

Explanation

Beta-blockers can potentiate allergic reactions to fluorescein, so identifying their use is important before angiography. Antihistamines, diuretics, and anticoagulants do not have a well-recognized interaction that alters fluorescein safety in the same way.

Question 44Ophthalmic patient care and clinical assisting

A patient is undergoing a visual evoked potential (VEP) test. Which instruction should the assistant give to optimize the recording?

  1. Look away from the screen periodically
  2. Blink rapidly to stimulate the retina
  3. Fixate on the center of the pattern and minimize blinking Correct answer.
  4. Keep the eyes closed and relax

Explanation

VEP testing requires steady fixation on the pattern and minimal blinking to obtain a reliable cortical response. Keeping the eyes closed, blinking rapidly, or looking away would degrade the recording.

Question 45Ophthalmic patient care and clinical assisting

An ophthalmic assistant is preparing to measure a patient's intraocular pressure with a Goldmann applanation tonometer. Which action correctly prepares the slit-lamp and prism before measurement?

  1. Align the tonometer prism with the slit beam at roughly a 60-degree angle and set the magnification to low power Correct answer.
  2. Rotate the illumination system to the cobalt-blue filter and adjust the beam to a wide diffuse light
  3. Instill a miotic drop to constrict the pupil and wait five minutes before applanating
  4. Set the slit-lamp illumination to a broad beam at maximum brightness and angle it toward the prism tip

Explanation

For Goldmann applanation, the prism is illuminated at an angle of about 60 degrees with the cobalt-blue filter in place, and the examiner begins at low magnification to bring the mires into view before switching to higher power. The blue light makes the fluorescein-stained tear film visible as two green semicircles. Correct alignment and lighting are what allow the mires to be centered and read accurately.

Question 46Ophthalmic patient care and clinical assisting

An ophthalmic assistant is about to perform a Schirmer I test on a patient with dry-eye symptoms. Where should the test strip be placed?

  1. At the lateral canthus, with the tip resting on the closed lid margin
  2. In the inferior fornix at the junction of the middle and lateral thirds of the lower lid, without touching the cornea Correct answer.
  3. Over the center of the cornea after instilling a topical anesthetic
  4. In the superior fornix beneath the upper lid, with the lid taped closed

Explanation

The Schirmer strip is placed in the lower fornix, typically at the junction of the middle and lateral thirds of the lid, with the folded end resting in the cul-de-sac. It must not contact the cornea, because corneal touch triggers reflex tearing that invalidates the basal secretion measurement. The patient keeps the eyes gently closed or looks slightly up during the five-minute test.

Question 47Ophthalmic patient care and clinical assisting

During a dilated fundus examination, a patient with a history of angle-closure glaucoma becomes agitated and reports a severe brow ache with blurry vision and halos around lights. Which action should the assistant take first?

  1. Reassure the patient that these are expected effects of the dilating drops and continue the examination
  2. Stop the examination, notify the ophthalmologist immediately, and keep the patient in the office for evaluation Correct answer.
  3. Turn off the room lights and ask the patient to sit quietly until the symptoms pass
  4. Instill another drop of tropicamide to complete the dilation more quickly

Explanation

Severe brow pain, blurred vision, and colored halos after dilation in a patient with a narrow angle suggest acute angle-closure glaucoma, which is an ocular emergency. The assistant should halt the examination, alert the ophthalmologist at once, and keep the patient on site so intraocular pressure can be measured and treatment started. Continuing the exam or adding drops delays sight-saving intervention.

Question 48Ophthalmic patient care and clinical assisting

An ophthalmic assistant is performing a cover test to evaluate a patient for strabismus. Which observation does the test primarily document?

  1. The integrity of the corneal light reflex only, without occluding either eye
  2. The amplitude of accommodation measured with plus and minus lenses
  3. The presence of a latent or manifest deviation by watching the uncovered eye move to take up fixation Correct answer.
  4. The patient's ability to distinguish red from green targets at near

Explanation

In the cover test, one eye is occluded and the examiner watches the uncovered eye; movement to pick up fixation indicates a manifest deviation (tropia). Uncovering the eye and observing it move back reveals a latent deviation (phoria). This alternation of cover and uncover is what distinguishes tropias from phorias.

Question 49Ophthalmic patient care and clinical assisting

An ophthalmic assistant is preparing to instill a fluorescein strip and topical anesthetic before measuring intraocular pressure. Which sequence best protects the patient and preserves test accuracy?

  1. Instill the anesthetic, wait thirty minutes, and then apply the fluorescein strip to the upper lid margin
  2. Place the fluorescein strip directly on the cornea, then instill the anesthetic drop afterward
  3. Instill the anesthetic first, then touch the fluorescein strip to the inferior bulbar conjunctiva away from the cornea Correct answer.
  4. Skip the anesthetic and apply the fluorescein strip to the closed eyelid, then open the eye

Explanation

The anesthetic is instilled first so the eye is numbed before any strip touches the conjunctiva, and the moistened fluorescein strip is then briefly touched to the inferior bulbar conjunctiva, away from the cornea. This avoids corneal abrasion and patient discomfort while staining the tear film for applanation. Touching the cornea with a dry strip risks injury and invalidates the measurement.

Question 50Ophthalmic patient care and clinical assisting

An ophthalmic assistant is explaining the Amsler grid test to a patient with macular symptoms. Which instruction should the patient receive?

  1. View the grid under bright light while reading a near card, then compare the two eyes' reading speed
  2. Look at the grid from across the room with both eyes open and describe the colors of the squares
  3. Cover one eye, fixate on the center dot, and report any areas where the lines appear wavy, missing, or distorted Correct answer.
  4. Focus on the outer border of the grid and count how many squares are visible without moving the eye

Explanation

The Amsler grid is a central visual field test for the macula: the patient wears near correction, covers one eye, and stares at the central dot while noting any lines that look wavy (metamorphopsia), broken, or absent (scotoma). Each eye is tested separately so a unilateral defect is not masked. The findings help detect macular disease such as age-related macular degeneration.