Variation and correlation of standard clinical phoropter tests of phorias, vergence ranges, and relative accommodation in a sample of school-age children.
This paper presents a study of standard clinical phoropter tests of dissociated phorias, fusional vergence ranges, and relative accommodation ranges in 244 school-age (7.9 to 15.9 years of age) children. The tests studied included von Graefe phorias and base-in and base-out fusional vergence ranges at both distance and near, as well as negative relative accommodation (NRA) and positive relative accommodation (PRA) tests. Coefficients of correlation among the various tests are presented. Means and correlations were similar to those previously reported for adult populations. Distributions of distance lateral phorias and some distance fusional vergence parameters were leptokurtic.
Jackson
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College of Optometry Northeastern State University, Tahlequah, OK 74464.
Goss
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D000065:Accommodation, Ocular; D000293:Adolescent; D002648:Child; D003290:Convergence, Ocular; D005260:Female; D006801:Humans; D008297:Male; D013285:Strabismus / Q000503:physiopathology*; D014787:Vision Tests; D014792:Visual Acuity / Q000502:physiology