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Streff syndrome is a vision condition primarily exhibited by children under periods of visual or emotional stress .. vision. visual perception. emotional stress. emotional stress. Frequently patients will have reduced stereopsis , large accommodative lag on dynamic retinoscopy , and a reduced visual field -LRB- tubular or spiral field -RRB- .. stereopsis. stereopsis. retinoscopy. retinoscopy. Streff Syndrome was first described in 1962 by an optometrist , Dr. John Streff as Non-malingering syndrome .. optometrist. optometrist. In 1962 , Dr. Streff and Dr. Richard Apell expanded the concept to add early adaptive syndrome as a precursor to Streff syndrome .. Dr. Streff believed the visual changes were induced by stress from reading .. There is dispute on the taxonomy of functional vision defects .. vision. visual perception. Some research indicates that Streff syndrome may be caused by a dysfunction in the magnocellular pathway of the retinal ganglion cells .. magnocellular pathway. magnocellular pathway. These cells are only 10 % of the retinal nerve cells and register motion detection .. motion detection. motion detection. Early Adaptive Syndrome