Sight-Threatening Microbial Keratitis in a Remote Setting
A 38-year-old soft contact lens wearer presents to Dr. K in Santa Fe with a 2-day history of pain, photophobia, and decreased vision in the right eye. Acuity is 20/80; slit lamp shows a 2.0 mm corneal infiltrate 1.5 mm from the visual axis with an overlying epithelial defect and a 1 mm hypopyon. The patient wears extended-wear lenses and admits to sleeping in them. Dr. K is TPA-certified and practices 90 minutes from the nearest ophthalmologist. Dr. K wants to start hourly topical moxifloxacin, prescribe oral ciprofloxacin, perform an in-office corneal scraping for culture, and add topical prednisolone acetate at the 24-hour visit if improving. The patient asks to be treated locally because travel is difficult. Dr. K has no culture lab pickup on weekends and has not documented a discussion of referral.
1. May Dr. K undertake this plan under New Mexico law? Address topical and oral prescribing, corneal scraping, and steroid use.
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Dr. K's topical moxifloxacin is within the therapeutic scope of a TPA-certified New Mexico optometrist. Oral ciprofloxacin is also an oral medication that may be prescribed for ocular disease if there is no contraindication and the record documents the indication, dose, and follow-up. Corneal scraping for culture is a minor diagnostic procedure; it should be performed only if authorized by the Board's rules and within Dr. K's training, and it does not replace the need for ophthalmology involvement in a sight-threatening case. A 2 mm infiltrate with hypopyon and 20/80 vision is not routine. Steroid use is especially risky before the infection is controlled; starting prednisolone at 24 hours without culture results or specialist input could worsen fungal or atypical infection. The safest lawful plan is to start topical therapy, arrange same-day ophthalmology consultation, and document informed consent and refusal.
2. What are Dr. K's referral and documentation obligations?
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The referral obligation is driven by the severity: hypopyon, decreased vision, contact-lens wear, and a paracentral infiltrate are red flags for sight-threatening microbial keratitis. Dr. K should telephone the ophthalmologist, document the time, the person contacted, the findings, and the plan, and give the patient written instructions on when to go to the emergency department. If the patient cannot travel, Dr. K should arrange the fastest available consultant input rather than simply treating locally. The record should include informed consent for treatment, the risks of delay, the medication regimen, follow-up within 24 hours, and the criteria for urgent referral. A note that says 'return PRN' is inadequate.
3. If the patient refuses referral, how should Dr. K proceed?
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If the patient refuses referral, Dr. K should document a detailed informed refusal: the risks of vision loss, infection, and perforation; the alternatives; and the patient's reasons. Dr. K may continue treatment within scope, but should not promise a good outcome or pretend that local care is equivalent to specialist care. A short-interval follow-up-ideally the next day-is essential. If the patient deteriorates, Dr. K must escalate and arrange transfer. The Board is likely to ask whether the optometrist recognized the limits of the setting and acted reasonably. The refusal belongs in the patient's record, signed if possible.