Humans and other animals have many phenotypic variations in eye color. The genetics of eye color are complicated, and color is determined by multiple genes. So far, as many as 15 genes have been associated with eye color inheritance. Some of the eye-color genes include OCA2 and HERC2.
Answers (2). green. There are many reasons accounting for the fact that your eyes go out of focus and it is quite normal in the daily life. The tiredness of eyes can result in your difficulty in focusing on object. A migraine headache, as said by the ophthalmologist, can also cause the eye go out of focus.
âThere are tiny muscles inside your eyeball that change the shape of your eyeâs lens in order to bring whatever youâre seeing into focus,â Dunaief explains. After hours of sitting in front of your computer screen, those muscles can grow tired from focusing on a single fixed point. âIn some cases, those muscles become so fatigued that your eyes can no longer focus,â Dunaief adds. He says research has also shown that when reading or working online, people tend to blink less.