BTS Opticien-Lunetier flashcards
BTS Opticien-Lunetier · Build recall with a focused review session.
20 cards. Read the term and the definition here. The deck at the top of this page is optional.
- Diopter
- A reciprocal-meter measure of optical power in the applicable model, requiring the corresponding distance and sign convention.
- Prism diopter
- A prism measure linked to transverse displacement over a defined distance, distinct from an angular degree.
- Dispersion
- Variation of refractive behavior with wavelength that contributes to chromatic effects and is not determined by index alone.
- Critical angle
- The boundary angle in a specified higher-to-lower-index refraction model above which the ordinary transmitted-ray solution is absent.
- Optical path
- The product or accumulated relationship of refractive index and geometric travel used in relevant wave and interference models.
- Power cross
- A representation of the powers in the two principal meridians used to check a spherocylindrical prescription.
- Back vertex power
- A lens power referenced to its rear surface and focal relationship, distinct from every equivalent-system power.
- Boxing dimensions
- Frame or lens dimensions defined by a reference box and used with the actual fit and centration measurements.
- Prism reference point
- A specified point at which prism is evaluated for the relevant lens design rather than any arbitrary marked location.
- Mounting stress
- Mechanical loading introduced during assembly that may affect the lens and needs review under the actual material and frame procedure.
- Accommodation
- A change in the eye’s focusing state relevant to near vision, assessed with the person’s actual capacity and task.
- Spherical equivalent
- The sphere plus half the cylinder in the stated representation, summarizing rather than reproducing all meridional correction.
- Heterophoria
- A latent alignment tendency revealed when fusion is disrupted, interpreted with symptoms and the complete binocular assessment.
- Oxygen transmissibility
- A lens-related oxygen transport measure involving permeability and thickness that does not guarantee freedom from every complication.
- Referral warning
- A symptom or finding requiring the appropriate medical or specialist pathway rather than routine optical adjustment alone.
- Taux de marque
- Gross margin divided by the tax-exclusive selling price under the stated business definition, distinct from a cost-based margin rate.
- Taux de marge
- Gross margin divided by the tax-exclusive purchase cost under the stated definition, not the selling-price-based rate.
- Contribution margin
- Revenue remaining after variable costs within a supplied model, used with fixed costs in break-even analysis.
- Standardized estimate
- A regulated consumer-information document whose required content and coverage presentation follow the applicable French framework.
- Purpose-limited record
- Information kept and used for defined lawful purposes with appropriate security, access and retention rather than indefinite unrestricted storage.