These problems may be inherited, or they may be acquired, usually as a result of a mild brain injury from whiplash or a blow to the head. Too many psychologists and physicians miss the problem entirely. Too frequently, assessment of children s and adult s vision is limited to measurement and correction of acuity, or clarity of vision. Further, in typical school vision assessments, only distance vision, not close visual acuity is assessed. Binocular coordination, speed of accommodation and other important functions are not measured at all.
Acuity is only one of many elements of good vision.
The inability to create easy, rapid and clear binocular vision can dramatically interfere with reading, attention and comprehension. In adult life many people suffer needless headaches and confusion stemming from poor visual processing. Sixty to eighty percent of children with reading disabilities have measurable, correctable problems in accurate aiming of both eyes at the line of print. Many children have limited depth perception due to failures of proper binocular vision. These deficits lead to poor eye-hand coordination, clumsiness, and performance problems.