Procedures performed by Charles Brown, OD in Birmingham, AL
Refraction assessment
We can determine your prescription for glasses by doing a refraction assessment. We will get you to look through a mask-like device that contains wheels with different lenses of different strengths (phoropter) to help judge which combination gives you the sharpest vision.
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Visual acuity test
This test measures how clearly you see. We will ask you to identify different letters of the alphabet printed on a chart (Snellen chart) or a screen positioned some distance away. The lines of type get smaller as you move down the chart. Each eye is tested separately. Your near vision also may be tested, using a card with letters similar to the ...
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