FUNCTIONAL BLINDNESS By N., Pam M.S. - May 11, 2013 a deterioration in vision with no apparent cause. Acuity is lost and can include painful symptoms like burning and tired eyes, double vision, convergence and concentric field constriction. FUNCTIONAL BLINDNESS: "Complete functional blindness is a rare condition." Related Psychology Terms TUNNEL VISION SENSORY CONVERSION SYMPTOMS QUADRANOPIA DIPLOPIA BETA MOVEMENT MULTIPLE SCLEROSIS (MS) FIXATION POINT TROPIA DIRECT GLARE BLIND SPOT Cite this page: N., Pam M.S., "FUNCTIONAL BLINDNESS," in PsychologyDictionary.org, May 11, 2013, https://psychologydictionary.org/functional-blindness/ (accessed April 3, 2020).