The technical term for ‘light sensitivity’ is [photophobia](https://en.wikipedia.org/wiki/Photophobia). After 2 minutes searching, I could only find headlines and such agreeing with me or unrelated to eye color (so not very good research to link), but previously I’ve seen statistics that photophobia is reported about 5% more in light colored eyes than dark colored ones. Theoretically, the darker pigment in the eyes can absorb more light than the lighter ones (leaving less to bother the eyes themselves), but in practice light eyes only make people already sensitive to light (migraines, basement dwellers, cognitive bias, other predispositions) just slightly more ~~sensitive~~ likely to report photophobia (important distinction).
It’s noticeable to the point that you feel pain. Like imagine the feeling of “wince” but isolated only in your eyes. It’s like all of your ocular muscles spasm at once and it’s quite painful. If it’s bright enough it will cause tearing as well.
If it’s a bright sunny day and I’m standing next to a large white vehicle, I quite literally cannot hold my eyes open more than a sliver and my hands instinctively come up and cover my face.
I can’t ELI5, but I have dark brown eyes, and my gf has blue. She comments all the time how she can’t stand it that I never wear sunglasses
Sure, light bounces off of snow and gravel etc, and I’ll have to squint. But that’s about it. Sunglasses while driving, or golfing, is a major distraction. I don’t even wear glasses at the lake.
Yet I got that thing where sunlight makes me sneeze, so there’s that. Can’t have it all
I don’t think there’s a single answer.
It would not astonish me if people with light eyes are slightly more sensitive to light than people with dark eyes. But unless a study has been done on it (none have that I’m aware of), it would be really hard to say how much.
Within each eye color, too, there’s a spectrum. Some people with light eyes are fine with bright lights. Others hate them. The same goes for people with dark eyes.
Also, short of a study with controlled conditions, this is all very subjective. Anyone who goes from darkness to somewhere bright will have trouble seeing for at least a few seconds. Possibly people who live in darker environments (e.g. Seattle vs. LA) also have a harder time adjusting to bright lights.
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