The visual system can patch over tiny defects (see: blindspot) and visual field tests have not been part of standard yearly eye exams I've been to. And possible longer-term risks (say increased risk of cataracts) would be harder to conclusively show. And the sample size involved would skew heavily towards young healthy adults instead of people with pre-existing eye conditions.

I realize it's not easily possible to prove the negative, but when you're exposing the public the burden must be on the company to be transparent and rigorous. And from what I see it's difficult to even find certification documents for the lidars used in commercial self-driving vehicles, possibly because everything is proprietary and trade secret.

The fried iPhone pixels are spooky. Eyes clearly aren't as affected, but they also aren't as easy to replace.

“…Every day dozens of cigarettes are smoked in close proximity to other people… that’s not a peer reviewed study, but it seems to work…” - someone probably, sometime in the 1950s

Workplace injuries have never been swept under the rug, especially if those cleaners are non-persons in the eyes of the government.