Heterochromia refers to a harmless genetic anomaly resulting from an uneven distribution of pigment within one or both eyes.

MIT engineers have made a breakthrough in this area—they’ve developed a method to grow muscle tissue that contracts in ...

There are four main types of uveitis, depending on where the inflammation happens. The most common kind is called anterior uveitis, which affects the front part of your eye, including the iris and ...

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

That coloured circle is called the iris and the black spot in the middle is the pupil. This is the part of the eye that lets the light in. Lights out please! When it’s dark, muscles in the iris ...