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.
Tired eyes and blurred vision. If you spend a long time using a computer or watching television, your eyes can become tired and your vision blurred. Using a computer does not cause permanent damage to your eyes. However, working on a computer is a demanding visual task that can cause eye discomfort.