You get vitamin D from butter, mushrooms, blubber from marine mammals etc.
No the point is not to get sunlight directly in your eyes that will make you blind.
The hat blocks the direct sunlight so you're only getting the reflected sunlight.
And your chest and back are the parts that are able to absorb the most vitamin D from the sun.
Your scalp does not need to be exposed to the sun to absorb vitamin D
Ah, you don't live in northern Europe.
of course you need to be moderate with it but proper bright sunlight (indirect, from pavement and surrounds) triggers endocrine processes. it's a very good idea to get out first thing in the morning after dawn and walk around for 15 minutes with no glasses on. but other than that, yeah. if it's that sunny, wear a singlet. if it's even sunnier than that, wear a hat and blue or white clothes.
it is good to get natural light in the eyes, for your glands, especially the pineal gland, which governs the day/night cycle. UV is part of that, the A and B spectra are not harmful to the eyes like C.
