Pupillometry measures the size and reactivity of the pupil, the dark circle at the eye’s centre through which light enters. Typically, the pupil contracts and dilates depending on the amount of ...

Kaplan says. For eye color, the OCA2 gene determines how much melanin is in the iris (the colorful ring around your pupil) by controlling how much P protein is produced. For people with blue eyes ...

The fascinating variety of cat eye colors results from some fascinating genetic interactions, development, and adaptation due ...

WE have shown 1 that the impression of brightness produced by a light ray which forms an image on a fixed area of the retina depends in high degree on the position of entry of the ray in the eye ...

It was a doctor, originally from Russia, who founded Kerato, the first practice of its kind in the U.S. that specializes in cosmetic eye color change. He's a board certified ophthalmologist who says ...

(Interestingly, different animals have different color tapeta ... which is why so many nocturnal eyes have slit pupils. These apertures can be vertical, horizontal, or diagonal.