Here's how some scientists think some eyes may have evolved: The simple light-sensitive spot on the skin of some ... a deepening pit that made "vision" a little sharper. At the same time, the ...

Eye floaters are small dark spots or wisps that move slowly ... floaters A curtain of darkness across your vision or a collection of flashing lights, which can both be signs of retinal damage ...

Migraine can affect vision in many ways. Some people see sparkling lights or blind spots, while others experience kaleidoscope vision. This visual symptom can occur in one or both eyes but might ...

Usually people notice symptoms including blurry vision, discolored spots in vision ... were properly certified and didn't let in any light that was less bright than the sun, the discomfort ...