Positive angle kappa in albinism

Journal of AAPOS : the Official Publication of the American Association for Pediatric Ophthalmology and Strabismus
Kimberly S MerrillC G Summers

Abstract

Albinism is an inherited disorder of deficient melanin production. There is a high prevalence of strabismus in patients with albinism. We investigated the prevalence of a positive angle kappa in patients with albinism and report its effect on assessment of binocular alignment. We retrospectively reviewed the charts of 207 consecutive patients with the diagnosis of albinism seen at the University of Minnesota between 1984 and 2002. Angle kappa and alignment using prism and alternate-cover test (PACT) and Krimsky measurements were recorded. In 99.6% of our patients with albinism, angle kappa was noted to be positive. The mean difference between PACT and Krimsky measurements was 17.11 prism diopters in the more exotropic (or less esotropic) direction per Krimsky test. Because of the high prevalence of a positive angle kappa, esodeviations often appeared less and exodeviations appeared greater than when measured using PACT. Positive angle kappa can be considered another clinical feature of albinism. Consideration should be given to the effect of positive angle kappa on alignment as observed by Krimsky measurement when planning extraocular muscle surgery, particularly when preoperative sensory testing suggests binocular potential.

Citations

Jul 23, 2019·Journal of Binocular Vision and Ocular Motility·Kimberly Merrill
Apr 25, 2009·Optometry and Vision Science : Official Publication of the American Academy of Optometry·C Gail Summers
Aug 1, 2012·The American Orthoptic Journal·Kimberly S Merrill, C Gail Summers
Nov 21, 2013·Graefe's Archive for Clinical and Experimental Ophthalmology = Albrecht Von Graefes Archiv Für Klinische Und Experimentelle Ophthalmologie·Alberto Domínguez-VicentRobert Montés-Micó
Jun 9, 2015·Journal of Pediatric Ophthalmology and Strabismus·Brandon K McCaffertyC Gail Summers
May 14, 2020·Journal of Binocular Vision and Ocular Motility·Michael C Brodsky
Aug 25, 2020·Journal of Neuro-ophthalmology : the Official Journal of the North American Neuro-Ophthalmology Society·Maxence RateauxMatthieu P Robert
May 28, 2021·Journal of the European Academy of Dermatology and Venereology : JEADV·E Moreno-ArteroS Hadj-Rabia

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