Light is crucial for our vision. We see objects around us when light bounces off them and enters our eyes. But sometimes, light can be the cause of vision problems when it causes halos or glare.
Halos are bright circles that appear to surround a source of light, such as oncoming car headlights. Glare is light that enters your eye but doesn't help you see better. Rather, it interferes with your vision.
Glare can be:
Uncomfortable. When you're trying to see in the presence of a too-bright...
Dim light might make it difficult for the eyes to focus, which can cause short-term eye fatigue, says Richard Gans, MD, FACS, an ophthalmologist with the Cleveland Clinic Cole Eye Institute. "But there is no scientific evidence that reading in the dark does any long-term harm to your eyes," Gans says.
Challenging visual work, such as reading in insufficient light, can also lead to short-term drying of eyes because you blink less often, Gans adds. Again, this is uncomfortable, but it doesn’t damage the structure or function of the eyes. You can use over-the-counter lubricating drops if dry eyes are a problem.
On the off chance that your next question is going to be, "What about sitting too close to the TV?" we have the same answer. Getting too close to the set for your favorite shows won’t harm your eyes -- "either from overfocusing or from radiation," Gans says.