Photoscreening is a pediatric vision screening method that uses a specialized camera to assess a child's visual acuity. Other related terms are autorefractor, objective screening, and instrument-based screening. By detecting specific light reflexes from each eye, the devices produce images that can help identify refractive errors (such as a prescription for glasses) and ocular misalignments (such as strabismus). Photoscreening is particularly useful with preverbal children (under age 3 years), young children (age 3 to 5 years), and older, non-cooperative, or non-verbal children. However, photoscreening cannot determine exactly how well a child’s visual acuity is developing.