Cones work in bright light and register detail ... One consequence of having extremely light sensitive eyes, is that they must be adequately protected during the day. Some animals accomplish ...

Medically reviewed by Christine L. Larsen, MD Photophobia is an abnormal sensitivity to light. It is associated with dry eye ...

"Miosis" is a medical term that describes the constriction of the pupils. Learn its causes, symptoms, and how to treat it.

with long hours of bright light in the summer and almost total darkness in winter. One theory is that in the winter, pressure inside the animal's eye builds due to the effort of keeping the pupils ...