TY - RPRT TI - Inducing myopia, hyperopia, and astigmatism in chicks. AU - E L Irving AU - M G Callender AU - J G Sivak PY - 1991 DO - 10.1097/00006324-199105000-00007 UR - https://pubmed.ncbi.nlm.nih.gov/1852398/ ID - 1852398 ER -