Dr Boothe

Pupil is what appears as a small black dot in the center of the iris and changes its diameter in response to ambient lighting.

Radial Keratotomy is a surgical procedure designed to correct myopia (nearsightedness) by flattening the cornea and is commonly referred to as RK.

Refraction is a test to determine the best eye glasses or contact lenses to correct a refractive error (myopia, hyperopia, astigmatism) OR the bending of light by the use of a lens or other material.

Dr William Boothe

Lacrimal gland - The small structure in each eye which produces tears. It’s above the outer corner of the eye, and lacrimal ducts run from the inner corner to the nose. See also punctum and nasolacrimal duct obstruction.

Laser - Although this is used as a word now, it was originally the acronym for Light Amplification by the Stimulated Emission of Radiation. There are many lasers, all man-made for specific purposes. Laser light has a single wavelength (i.e., color), rather than all colors like everyday white lights. Its waves are directional rather than scattered, and each wave is in step with the next one, which vastly increases the power of a laser light.

Dr Boothe

: Perioperative - Pertaining to the period of time between being admitted to hospital for surgery to being discharged afterwards. A perioperative nurse is one who cares for the patient throughout that time.

Peripheral Vision - Also called “side vision”. Vision to each side of where the eyes are focused. Direct vision uses the fovea, the center part of the macula, which gives the most detailed vision. Peripheral vision uses the areas of the retina surrounding the macula which give less detail but better night vision. Without peripheral vision, a person would have only tunnel vision, and would be legally blind.
Dr William Boothe