No, normal pigmentation of the iris has no effect on vision which occurs through the un-pigmented pupil. That said people with light eyes are more likely to be photosensitive (sensitive to light).
The retina is a portion of the back of the eye. Sometimes there is uneven pigmentation. It is nothing to worry about medically.
Your iris might look brown because this is the color of the pigmentation of that part of the eye. Brown is the most common color of the human iris and can be light brown to almost black.
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iris
Correct the whole Iris.
The iris is the colored area in the eye and is surrounded by the sclera,the white section in the human eye.The absence of iris affect vision. Its function is important because it is responsible for regulating the amount of light that enters the eye..Too much or too little light that gets into the eye hampers vision,.It controls the amount of light that enters the eye by opening and closing the pupil.
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Genes are what determine the color of a persons eyes. However, the concentration of the melanin in the iris of the eye helps determine the pigmentation of the color.
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# An abnormal sensitivity to or intolerance of light, especially by the eyes, as may be caused by eye inflammation, lack of pigmentation in the iris, or various diseases. # An abnormal or irrational fear of light.
Here's an example:If you were to decrease the amount of light given to a goldfish daily then, the intensity of it's color pigmentation would decimate because, it's color pigmentation cells require vitamin D to function.
Full sharing of facts and vision.