Just remember not to look directly into the sun once it has risen above a certain point. The sun is amazing and all but it's also a giant ball of incredible energy and it will damage your retina.

That being said, I recently watched an interesting documentary about several studies exploring the connection between the exposure to sunlight and eyesight. It showed that the less time children spend outside in daylight the more likely they are to develop myopia. Researcher linked the rising numbers of children who need glasses to how they spend a lot more time inside, and even though artificial light often seems very bright it's not even close to daylight (even when it's overcast!). They recommended that in school at least 2 hours per day should be scheduled for outside activity and classrooms need big windows to let in sufficient daylight. (I'd give a link to the source, but the documentary is in german ┐(´-｀)┌ )