- The term ‘Uvea” was first used by Galen, a Roman physician, to include both the choroid and the iris, because they resemble a grape from which the stalk had been torn out leaving a hole in front, the hole being the pupil of the eye.
- Only about 2% of the population has green eyes.
- The idea for the general principle of a contact lens was made by Leonardo da Vinci in 1508.
- Swiss physician A. E. Fick is credited with fitting the first glass contact lens in 1887.
- The retina has 10 separate layers. The cornea has 5 separate layers.