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.
This lens causes light to diverge slightly before it reaching the eye. When farsightedness (called hyperopia) is present, a person is able to see far away objects well but has difficulty seeing close up objects. Light rays become focused behind the retina.Possible causes include eyeballs that are too short or by lens systems that have too little focusing power.his lens causes light to diverge slightly before it reaching the eye. When farsightedness (called hyperopia) is present, a person is able to see far away objects well but has difficulty seeing close up objects. Light rays become focused behind the retina.