Circles and red/green panels at opticians
September 27, 2007 8:55 AM Subscribe
Eye tests: What's the purpose of the green/red rectangles with black circles in?
posted by long haired lover from liverpool to Health & Fitness (7 answers total) 1 user marked this as a favorite
I had an eye test a few days ago. Part of the test involved looking at red and green oblongs on the illuminated panel, which contained two concentric circles in each. Unfortunately, I didn't listen correctly during the testing of my right eye, and thought that I had to tell the optician which rectangle seemed brightest. In fact, she wanted to know in which rectangle (red/green) the circles seemed most distinct, as I learned when she then tested my left eye. I was a little too embarrassed to tell her I'd slipped up earlier, so went with it.
How important is this? Is it likely my prescription will be screwed up?