The nurse performed a “sight test”, when you come to see your Optometrist we perform an “Eye Exam”. A “sight test” only measures if you can see 20/20. An “Eye Exam” measures all aspects of visual function: sight (or visual acuity), binocular vision function (the ability of the eyes to work together), visual pathway integrity, and the overall health of your eyes. Seeing 20/20 is an important part of the overall function of your eyes; however, just because you can see 20/20 does not necessarily mean your eyes are 100% healthy. There are many conditions that exist in which someone can still see 20/20. To name just a few examples: Diabetic Retinopathy, Glaucoma, and even Retinal tears or detachments (if the macula is unaffected). I recommend having a full eye exam every 1-2 years, even if you are in good health and feel like you don’t need glasses.