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Screening Methods for the Detection of Preclinical Vision Loss in Children in the Schools: Verbal and/or Literate Children

Correspondence: Requests for reprints should be addressed to: Pamela Berg, C.O., Casey Eye Institute, 3375 SW Terwilliger Blvd., Portland, OR 97239.

Commonly used methods of vision screening in schools is discussed with the currently accepted criteria for pass/fail. There remain differences on the best test to use, the best age to perform subjective acuities and who should be doing the screening. Some tests are still being used that do not conform to the Snellen gold standard. Testing methods vary in part due to the diversity of the screeners. A follow-up mechanism to track children failing screenings must be in place in advance of the screening process. Until a standardized screening protocol is in place that is both sensitive and specific, and screeners are trained in testing technique, it will be impossible to validate data. Despite problems, screening at school entry or soon thereafter, remains a valuable tool and should be vigorously recommended to both educators and parents, as it plays an important role in amblyopia detection.

Key words: schools, vision screening, acuity tests, optotype