Heterochromia is a condition where a person has two different eye colors, which can be quite striking. It can be due to genetics or a result of an injury or underlying medical condition.
Here are the key facts extracted from the provided text:
1. Some people have two rows of eyelashes, known as Distichia.
2. Distichia is a rare genetic disorder.
3. It can cause irritation and may require microsurgery to correct.
4. Some individuals have a small hole near their ear, known as Fosseta or Pre-Auricular.
5. The cause of this hole is not fully understood, and it might be related to incomplete evolution or congenital malformation.
Please note that these facts are presented in the order they appear in the text.