The colored part of the eye surrounding the pupil is called the iris. It automatically regulates the amount of light entering the eyes by regulating the size of the pupil. Light is the primary ...

In a study well-timed for summer, vision scientists have found that eye freckles, dark spots on the colored part of the eye (iris), are more frequently found in people with higher lifetime exposure to ...

Eye color change surgery is used to change the colored part of the eye, called the iris, after an injury or other medical condition affecting the eye. It is also used for cosmetic reasons as a ...

Iridodonesis is a condition in which the iris (coloured part of the eye) vibrates during eye movements. Upon moving the eye rapidly, the iris can appear to ‘dance’, or ‘tremble’ (tremulousness). This ...

The iris is the colored part of the eye. Pigment dispersion syndrome (PDS) occurs when pigment rubs off the back of the iris and floats freely in the eye. Pigment pieces can block the eye’s drainage ...

A look at one of the entries that fooled solvers in last week’s puzzles. By Deb Amlen The UVEA is the middle layer of the eye. It lies under the sclera, or the white part of the eye. The iris, the ...