Seasonal variations in the progression of myopia in children enrolled in the correction of myopia evaluation trial.

ABSTRACT:

Purpose

To investigate monthly and seasonal variations in the progression of myopia in children enrolled in the Correction of Myopia Evaluation Trial (COMET).

Methods

An ethnically diverse cohort of 469 myopic 6- to <12 year-old children was randomized to single vision or progressive addition lenses and followed for 3 years with 98.5% retention. Progression of myopia was measured semiannually by noncycloplegic autorefraction (Nidek ARK 700A) and annually by cycloplegic autorefraction, with the former measurements used in these analyses. The semiannual progression rate was calculated as (change in spherical equivalent refraction between two consecutive semiannual visits/number of days between the two visits) times 182.5. Months were categorized as the midpoint between two vis

SUBMITTER: Gwiazda J 

PROVIDER: S-EPMC3915767 | biostudies-literature | 2014 Feb

REPOSITORIES: biostudies-literature