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

(martin.wojtczyk.de)
631 points wojtczyk | 8 comments | 31 Aug 24 04:29 UTC | HN request time: 0s | source | bottom
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djbusby ◴[31 Aug 24 06:30 UTC] No.41406931[source]▶
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.

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1. mrob ◴[31 Aug 24 07:01 UTC] No.41407026[source]▶
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/

replies(2): >>41411678 #>>41415852 #
2. immibis ◴[31 Aug 24 20:22 UTC] No.41411678[source]▶
Once I took apart an LCD monitor (with LED backlight) since one of the backlight elements was broken (I got it broken for very little money). I thought I'd see whether the LCD element can be used in front of a window to make a sci-fi type screen. Turns out the backlight is much, much brighter than daylight, and the LCD lets almost no light through. The LCD was too dark to make a cool sci-fi screen, and the backlight sitting separately was blindingly bright.
3. IWeldMelons ◴[01 Sep 24 10:58 UTC] No.41415852[source]▶
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.

replies(1): >>41424489 #
4. mrob ◴[02 Sep 24 11:31 UTC] No.41424489[source]▶
The "in contrast" is to chickens and guinea pigs, where the opposite occurs. What relevance this has to humans is unclear.
replies(1): >>41436523 #
5. IWeldMelons ◴[03 Sep 24 16:27 UTC] No.41436523{3}[source]▶
It happens in primates, blue light causes problems. So yeah very much relevant. Stop cherrypicking.
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6. mrob ◴[03 Sep 24 18:45 UTC] No.41437806{4}[source]▶
Outdoor daylight typically has more blue light in it than indoor light, yet outdoor light appears to be protective. So yes, "unclear" is accurate.
replies(1): >>41463851 #
7. IWeldMelons ◴[06 Sep 24 07:33 UTC] No.41463851{5}[source]▶
No this is incorrect. Spectrally, LED light has far "bluer" spectrum, with a very sharp peak at 450nm. Sunlight has its blue part smeared all over the range, with the most energy in cyan 500 area .
replies(1): >>41463884 #
8. fragmede ◴[06 Sep 24 07:40 UTC] No.41463884{6}[source]▶
Depends on the LEDs. High CRI LEDs are available for those that want light closer to sunlight.