Standardization of Some of the Common Tests Used in Determining the Acuteness of Vision of School Children |
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200 pupils tested acute vision acuteness of vision Alph alphabet test average distance ball best light cent column detected diameter different sized letters discern divided by 200 Doctor of Philosophy Dot test feet variation figures Grade III grades greatest distance Illit illiterate cards illiterate E largest number letter test letters and characters letters or characters letters or dots letters were seen limit of vision mean variation normal eye normal vision Number of feet number of pupils obtained by tests percentages poor vision representing the acuteness represents the results required to move Results obtained retina SCHOOL CHILDREN seen at 20 series of tests seven tests shows the number side of normal sixteen feet sixteen foot letters small squares Snellen 12 ft Snellen letters Snellen measurements subnormal table 11 tance tangent test for acuteness tests under consideration total combined distance twenty-four feet University of Pennsylvania vision as shown VISION OF SCHOOL vision showing