Good idea not to look at an eclipse without special solar eclipse glasses, i think they reduce the light intensity 100,000 fold to make it safe, the light it so strong even at at 85% or 95% level of eclipse, it can damage your retina permanently!! the lens in your eye focuses the infra red like a magnifying glass and burns your retina away! Only at 100% totality can you safely look for a briefest time without eye protections, uv sunglasses dont protect the retina from IR at all. i couldnt get the eye protection, and as it was cloudy, didnt head out to where astronomers were gathering. Also you need special protection for telescopes and lenses for cameras, you could do damage to your eyes so easily.