Dr William Boothe Surgeon

Accommodation - The eye’s ability to switch focus from near objects to far objects. It’s done by tiny muscles attached to the eye’s lens, which pull on the lens to change its convexity. As we age, those muscles become weaker and the lens becomes stiffer, a condition known as presbyopia, where reading glasses become necessary to see close-up objects.

Acuity - (a-KEW-uh-tee) Clarity or sharpness of vision, commonly expressed as 20/20 vision in relation to the Snellen acuity chart. This is the eye chart seen at every eye doctor’s office, with the big E at the top.

Dr Boothe

Legal Blindness - A definition of blindness which enables a person to apply for government disability benefits. It can be either a visual acuity of 20/200 (or worse), with corrective lenses, in the better eye, or tunnel vision in the better eye of 20 degrees in diameter. This level of blindness is severe, but does not necessarily prevent a person from functioning at all.

Dr William Boothe

: hyperopia - A refractive abnormality of the eye requiring a plus (positive or convex) lens for correction. Synonyms: far sighted, hypermetropia. Far or distance sighted people can see at a distance more clearly than they can see objects which are closer.
immune system - The body's internal defense system which defends you from dangers such as infections, cancer, etc. Normal healing is coordinated with the immune system. Occasionally abnormal immunity can cause problems such as iritis or arthritis. These conditiions are referred to as auto-immune conditions meaning your immune system becoming confused and attacking your body.
Dr William Boothe