I read up on Presbyopia https://en.wikipedia.org/wiki/Presbyopia , difficulty with focusing with age. I am nearing forty and noticing more difficulty focusing on close up objects.

But now I understand why it might be difficult for older people to deal with low-light situations. In these conditions, the pupils widen to capture more light, but this shortens the depth of field putting more pressure on the eyes to get the focus just right. Older eyes are less able to adjust focus so things will be blurry.

#presbyopia
#farsightedness

Myopia is ubiquitous in our world, but with kids outside and avoiding eye strain, human development suggests a truly weird trajectory...to wit, kids who use a marker of youth: reading glasses!

Read more at my #blog: https://www.adamasnemesis.com/2026/01/18/she-hasnt-grown-out-of-her-readers-yet/

This post's featured image is an experimental haptic interface from NASA in the 1990s.

#worldbuilding #vision #myopia #society #technology #alternatehistory #scifi #sciencefiction #hyperopia #farsightedness #nearsightedness #children