Refraction tests give the prescription for glasses or contacts, and they measure nearsightedness, farsightedness, presbyopia (blurring of vision at close range) and astigmatism (irregular shaping of the cornea). These results determine the best corrective features for different tasks, such as driving, reading and using the computer.
Visual Field screening measures the patient’s central and peripheral vision.
Glaucoma tests measure the pressure in the eye, a key indicator of eye health as elevated pressure can lead to optic nerve damage. We use the “puff of air” test and, when needed, an even more precise test using a Goldman applanation tonometer. Most patients should be tested for glaucoma for the first time by age 20.
Eye health tests use a slit lamp or biomicroscope to examine the front and inside of the eye magnified 10 – 25 times. We may dilate the eyes to enhance our examination of the retina.
Digital imaging photos provide even greater magnification of the eye as well as a permanent photographic record for observing changes over time. These photos are also used to screen for macular degeneration, diabetes, and hypertension.