sherrill42 t1_irib0j8 wrote on October 8, 2022 at 12:09 PM Reply to As we age, why does it become harder to see in dimly lit rooms? by cle_eech It's a whole host of different issues. As we age, the lens gets yellow, the pupil can't open as far, and the number of light-sensing cones decreases. https://www.ncbi.nlm.nih.gov/books/NBK218971/ As for yellowing, "At age 60, the amount of light reaching the photoreceptor cells of the retina is only one-third of the amount seen at age 20. " https://www.2020mag.com/article/color-changes-as-the-eyes-age ...or better... https://www.lrc.rpi.edu/programs/lightHealth/AARP/healthcare/lightingOlderAdults/agingeye.asp Permalink 57
sherrill42 t1_irib0j8 wrote
Reply to As we age, why does it become harder to see in dimly lit rooms? by cle_eech
It's a whole host of different issues. As we age, the lens gets yellow, the pupil can't open as far, and the number of light-sensing cones decreases.
https://www.ncbi.nlm.nih.gov/books/NBK218971/
As for yellowing, "At age 60, the amount of light reaching the photoreceptor cells of the retina is only one-third of the amount seen at age 20. "
https://www.2020mag.com/article/color-changes-as-the-eyes-age
...or better...
https://www.lrc.rpi.edu/programs/lightHealth/AARP/healthcare/lightingOlderAdults/agingeye.asp