It is a condition known as color blindness, which refers to the inability to perceive colors accurately or to distinguish certain color tones.
More...Astigmatism, Hyperopia, Myopia, and Presbyopia are related to refractive errors of the eye.
More...The small, transparent lenses placed directly on the eye to correct vision defects or for cosmetic purposes are called "contact lenses."
More...It is usually the loss of transparency of the eye lens, which occurs typically during the aging process or as a result of eye trauma.
More...Strabismus, a condition where both eyes do not focus on the same target. One eye may be directed upwards, downwards, inwards, or outwards.
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