Dr William Boothe Surgeon

Snellen Visual Acuity refers to one of many charts used to measure vision (black and white with an "E" at the top).

Stroma is the thick, middle layer of cells in the cornea.

Undercorrection is a complication of refractive surgery where the expected amount of correction is less than desired and often occurs where healing regresses more vigorously than predicted.

Dr Boothe

That pain can be alleviated with eye drops and ointments which reduce the friction when you blink, though in some cases an eye patch is necessary that prevents blinking until the erosions heal. By about the age of 40, there’ll be scarring beneath the corneal epithelium which impairs vision by clouding up the cornea. Early lattice dystrophy can be treated with an excimer laser, and in some cases a corneal transplant is done.

Dr William Boothe

: Excimer lasers have been used since 1987 for vision correction and were approved by the FDA in 1995 for correcting nearsightedness. Since then, they’ve been also approved for treating farsightedness and astigmatism.

Floaters - Tiny specks or strands that float in the field of vision. They move when the eyes move so they can’t be directly focused upon. Those shapes are the shadows cast on the retina by small clumps of cells in the vitreous humor. Often they’re more visible against a blank background like the sky or a wall. They become more common with age, as the vitreous starts to thicken and clump together. Mostly floaters are harmless, but if flashes of light accompany them, it could indicate a potential retinal detachment.
Dr William Boothe Surgeon