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.
Many conditions can cause red, yellow and gray eyes. Some are. serious and others are easily treatable. The most common unusual eye color is red. Red eyes occur. when the blood vessels near the surface of the eye become. dilated and enlarged. One of the most likely reasons for your. red eyes is conjunctivitis. Another common cause is eye strain. caused when your eyes try too hard to focus or when they are. overused from hours of driving, reading or simply using the. computer. Even high blood pressure can turn your eyes red.