Almost all blind people can see the sun. In the US blind legally means your eyes cannot be corrected to better than 20/200 - without glasses my eyes are worth than that so I have a good idea of what the low end of blind would be like. I take my glasses off to read. (of course most people who are blind will be much worse than me without glasses - but we can safely assume at least some of them can watch TV and get something out of it)