I have severe synesthesia, and part of it means that I hear what I see. Would this be specifically useful in any professional capacity? [more inside]
Eyes 20/10 with correction, where to get the sharpest prescription in the US? [more inside]
Why are there two different methods (positive and negative) for recording astigmatism? [more inside]
An optical illusion based on retinal fatigue allowing you to "see" an "impossible color"? [more inside]
If you lay your forehead on the palm of your hand and look down at your forearm, you get a distorted view of the connection between wrist and forearm, as well as a sort of "ghost" forearm silhouette at the margins. What's this called, why does it happen, and are there any paintings or other art that captures these effects?
Any harm in wearing sunglasses with two mismatched lenses? [more inside]
When I look at something (without my glasses) that's about 100 feet away, it looks a little blurry. If I look at a photo that includes stuff that's 100 feet away from the perspective, it's not blurry, of course, it's just smaller. BUT, if I look in a mirror, let's say a rear view mirror of a car, at something that's 100 feet behind me, it looks blurry, rather than just small. [more inside]
Pizza induced visual field distortion : When I chew - as on a piece of pizza (or whatever) and stare at a computer screen, especially from it distance, I perceive a "ripple" (or a "flicker") on the screen which is congruent with my chewing action. (more inside) [more inside]