Functions at the Definition of Blindness (FDB) is a new category indicating blindness due to brain injury or dysfunction. A student whose visual performance is reduced by a brain injury or dysfunction may be considered blind for educational purposes when visual function meets the definition of blindness as determined by an eye care specialist or neurologist. Students in this category manifest unique visual characteristics often found in conditions referred to as neurological, cortical, or cerebral visual impairment.
Reporting Code: FDB
Visual Measurement:
Functions at the Definition of Blindness
Should be used when visual functioning is reduced by a brain injury or dysfunction and visual acuity is not possible to determine using the Snellen Chart.