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Overall refractive astigmatism correlates with shorter chord length
BARCELONA — Measurement at a 2 mm chord length was more strongly correlated with overall ocular refractive astigmatism than when a 5 mm peripheral chord length was used, according to a speaker here. “We wanted to look at that relationship between corneal astigmatic power and ocular refraction and also look at different parameters such as chord length and ... different techniques for measuring corneal power,” Phillip J. Buckhurst, MD, said at the European Society of Cataract and Refractive Surgeons meeting.