Crystalline lens - The eye’s natural lens, which is behind the iris and in a healthy eye is completely clear. Light passes through it and is refracted by the lens to focus on the retina. Tiny muscles attached to the lens change its convexity according to where the eye is focused. As we age, it can start to become cloudy (cataracts), impairing our vision.
Dr. William Boothe Eye Surgery : 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.
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Keratometry - (kehr-uh-TAH-mih-tree) Measurement of the cornea’s curvature. It’s done with a keratometer.Dr William Boothe 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.
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