Visual Impairments

Visual acuity (VA) is one of many components of the visual perception  sense and is defined as the eye 's ability to resolve fine details. VA is a quantitative measure to see an in-focus image at a certain, standardized distance. VA is the most common measurement of visual function that is performed in a clinical setting. Some people may suffer from other visual problems, such as color blindness , reduced contrast , or inability to track fast-moving objects and still have normal visual acuity. Thus, normal visual acuity does not mean normal vision. The reason visual acuity is very widely used is that it is a test that corresponds very well with the normal daily activities a person can handle, and evaluate their impairment to do them. Visual dyslexia is a type of dyslexia - a perceptual dysfunction that is a genetic condition, not an optical problem. Disorganized magno cells in the mid-brain region cause a mistiming of the visual message (the information is mis-processed). These individuals are highly sensitive to certain light frequencies. Spectrally modified colored filter lenses can correct the timing imbalance and normalize the evoked potential (brain patterns). The correct color is vital as the wrong color,  can increase the blood flow to the posterior arteries of the brain and cause headaches and mis-processed information.

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