Tag Archives: Visual acuity

Does this explain that visual experience?

“OUR sight is sharpest at dawn and dusk – and now we may know why. It is not a result of changes within our eyes, but of how the brain processes visual signals.”

Clare Wilson Our eyesight is sharpest at twilight – and now we may know why. New Scientist. 10 April 2018.

https://www.newscientist.com/article/2165965-our-eyesight-is-sharpest-at-twilight-and-now-we-may-know-why/

This could be the solution to a mystery in sensory psychology that I’ve been wondering about for many years. I noticed a subtle effect in which my sense of sight without warning occassionally seems to improve, but not in any way that is obvious such as sharper focus or altered colour perception, resulting in a somewhat blissful effect that lasts a few seconds. I had noted that it seems to happen around the time of sunset, and I’d theorised that it is something to do with the visual system in my brain being able to readjust to a more optimal or fine-grained level of functioning as the result of a reduced level of light, similar to the effect of one’s eyes taking up to 20 minutes to adjust to the dark when one enters a dark cave during the day.