When last have you spoken to your optometrist?
You might have a problem with depth perception. I'm not joking
I was joking. Apart from a slight case of astigmatism, which is corrected by contact lenses, my eyes are fine.
I just don't understand how one can have trouble judging distances on a fully-lit road. But Rob posted a good example - that bike on high beams basically turns into a shapeless blob of light.