Dr. Ng should be thanked for drawing attention to a common misconception regarding eye color. However, there are some small points on which he relates outdated information. There are green eyes, contrary to Dr. Ng's claim. This is because melanin is not the only pigment. Melanin deposition is controlled by a gene on chromosome 15.
Melanin is brown and lipochrome is a yellowish-brown.
Lipochrome deposition is controlled by a gene on chromosome 19. Dr. Ng again should be thanked for addressing heterochromia iridis. I would caution Dr. Ng on the subject of inheritance of predominantly brown eyes from substantially blue eyed parents. No modern study to my knowledge, employing DNA matching, supports such an inheritance model without associative ophthalmological or other physiological dysfunction. Eye color inheritance is complex.