Medically reviewed by Bryan M. Wolynski, OD The sclera is the white part of the eye. It is made of tough, fibrous tissue that ...

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 ...

Medically reviewed by Johnstone M. Kim, MD A coloboma is a missing piece of tissue in a person's eye. It is a congenital ...

Cornea Tough, transparent covering over the front part of the eye. Convex in shape. Refracts light as it enters the eye (by a fixed amount). Iris Coloured part of the eye that contains muscles.

The uvea is made up of a layer of blood vessels, a muscular ring that surrounds your pupil, and the iris, the colored part of your eye. Together, they help your eyes focus so you can clearly see ...

Clear vision is what allows us to experience the world in vivid detail and navigate our daily lives with ease. But there are hundreds of eye diseases, from common conditions such as cataracts ...

A corneal ulcer is an open sore on your cornea. That's the thin, clear layer over your iris (the colored part of the eye). It’s also known as keratitis. People who wear contact lenses are ...

Retinal vs. iris scans Often confused with a retinal scan, iris recognition systems capture an image of the eye, and then analyse the coloured part around the pupil that you see on the front of the ...