Difficult, but not impossible. Scientists have come up with scenarios through which the first eye-like structure, a light-sensitive pigmented spot on the skin, could have gone through changes and ...

And with eyes covering almost their entire head, they have nearly 360-degree vision too. Nocturnal geckos have superb vision in dim light - their eyes are 350 times more sensitive to colour at night ...

The processing of optical information in the retina of the eye, where the light-sensitive photoreceptors and the first nerve ...

If you have sensitive eyes, or a condition that might lead to them: Mitigating photophobia symptoms includes avoiding non-natural light, so it’s best to talk through whether it’s a good idea ...

If you have eye pain, redness, blurred vision, or light sensitivity, be sure to see an eye doctor for a complete exam, and get treatment early to avoid complications.

Animals see differently than humans. Cats can navigate low-light environments, but what about their perception of color?

They have 24 eyes arranged in four clusters; 16 are simply light-sensitive pits, but one pair in each cluster is complex, with a sophisticated lens, retina, iris and cornea. Trilobites went down a ...