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Mean constriction rates for ring area, horizontal, and vertical diameter metrics, for right and left eyes, of subjects grouped within respective age categories. All measurements were obtained from outer borders (age categories: 1 = <10 years of age, 2 = 10 to <15 years of age, 3 = 15 to <20 years of age, 4 = 20 to <25 years of age, and 5 = 25 years of age and above).
