Dr Boothe

Blepharitis - (blef-uh-RI-tus) Chronic inflammation of the eyelids. It can be caused by an allergic reaction to some product, excess oil excreted by eyelid glands, bacterial infection, or poor facial hygiene.

Blind Spot - (a) The place on the retina where the optic nerve enters the eye. No visual cells are on the retina here, so no vision is possible at this place. In this sense, it’s a normal thing. (b) Also refers to any gap in a person’s visual field that corresponds to any area on the retina where visual cells are missing and in this sense, it’s associated with eye disease.

Dr William Boothe

Regression - Return of the cornea after PRK or LASIK to its original refractive error. Post-surgical healing happens on both the surface (epithelium) where the flap was created and in the stroma (next level down, treated by the laser), and these two layers heal at slightly different rates. The planned treatment is designed to slightly overcorrect the refractive error so that after healing, the eye will have no refractive error. But some patients heal more quickly and vigorously than was expected, so that the cornea restores itself back to its original shape, and this is known as regression. See also undercorrection.

Dr William Boothe Surgeon

: Convex Lens - Lenses with the opposite curvature to concave lenses. They bulge outwards like a ball and are used to correct hyperopia and presbyopia.

Cornea - (KOR-nee-uh) The front clear part of the eye in front of the pupil and iris. It acts as a lens, refracting light rays as they enter the eye. The eye’s crystalline lens refracts them further to focus them on the retina at the back of the eye. The cornea also allows light to pass out through it, making the iris visible, the eye’s color.
Dr William Boothe