6. Pupula Duplex
Pupula Duplex means double pupil. In this kind of rare eye condition, a person has two irises, corneas and retinas on a single eye. Also referred to as ‘evil eye’ or ‘double iris’, in medical terms the condition is named as Polycoria. We have included it in our list of ten rare eye conditions you must know about because these tend to affect a very small percentage of people right at birth. It is widely believed that this rare eye condition is a result of genetic defect or mutation. This condition is not harmful or contagious; it is believed that this might also not be genetically transferred.
5. Heterochromia Iridum
The next rare eye condition that we are going to discuss on our list of ten rare eye diseases you must know about is Heterochromia Iridum. Mainly associated with animals, this is rarely found in humans. In this condition, the colors of the two eyes differ. As mentioned earlier, it is most common in animals, especially cats and dogs. However, this rare eye condition is listed in the list of Rare Diseases prepares by the National Institutes of Health. This clearly means that although considered fairly rare, the condition does affect at least 200,000 individuals amongst the total population of the Unites States of America.