Browsing by Author "Stager, David R., Jr."
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Item Onset and progression of with-the-rule astigmatism in children with infantile nystagmus syndrome(Investigative Ophthalmology & Visual Science, 2010-01) Wang, Jingyun; Wyatt, Lauren M.; Felius, Joost; Stager, David R., Jr.; Stager, David R., Sr.; Birch, Eileen E.; Bedell, Harold E.Purpose: The purpose of this study was to examine the onset and progression of with-the-rule (WTR) astigmatism during the first 8 years of life in children with idiopathic infantile nystagmus syndrome (INS) or INS associated with albinism and to compare their development with that of normal children. Also explored was whether early WTR astigmatism influences emmetropization in children with INS and whether there is evidence of meridional emmetropization. Methods: Cycloplegic refractions culled from medical records were converted into power vector components: M (spherical equivalent), J 0 (positive J 0 indicates WTR astigmatism), and J 45 (oblique astigmatism). Two diagnostic groups (idiopathic, n = 106; albinism, n = 95) were evaluated and compared with a reference normal group (n = 495). Four age subgroups were evaluated: age≤0.5 year, 0.5