I'm sorry, I know the official line is to be dead-scared of anything natural out there but this is just total bullshit.
If sunshine was poisonous to your eyes you would already be blind. I look straight into the sun for several minutes at a time on a regular basis, if it gets uncomfortable I stop; been doing that for most of 40 years, no big deal. The sun is a life source, not our enemy. The only real danger is viewing the sun through lenses, glasses and other human contraptions.
There even used to be a death penalty on sun gazing back in the days; you have to stop and ask yourself why the people at the top are so hellbent on preventing it. But then who will buy all the useless protection-gadgets, and pay for the useless certifications, I hear you ask; not my problem.