Is my vision that bad? No, it's just a bug in Apple's Calculator

Maybe now is a good time to remind everyone: your vision will deteriorate. Keep this in mind when designing.

When I first came to HN it wasn't an issue. Now I have to use my own app for it so the font (and some other things) are workable.

According to my eye doctor the screen time is causing eyesight issues earlier. We're not designed to stare at a bright light 40cm away all day.

May want to look at some eye exercises - or at least something far away.

Very few screens are bright enough to compete with the normal brightness of outdoor sunlight. There's no evidence that close focus or looking at bright screens causes eyesight problems. Bright light actually seems to protect against myopia. Here's a good overview:

https://www.ncbi.nlm.nih.gov/books/NBK470669/

From the same article:

"In contrast, long-wavelength light is growth-inhibiting and short-wavelength light is growth-promoting in rhesus monkey (57) and tree shrew (58)."

Modern monitors have high amount of shortwave spectrum, blue is unusually shortwave.

The "in contrast" is to chickens and guinea pigs, where the opposite occurs. What relevance this has to humans is unclear.