Seasonal and Annual Change in Physiological Ocular Growth of 7- to 11-Year-Old Norwegian Children.

Purpose: To investigate seasonal and annual change in physiological eye growth in Norwegian school children.

Methods: Measurements of ocular biometry, non-cycloplegic spherical equivalent autorefraction (SER), and choroidal thickness (ChT) were obtained for 92 children (44 females) aged 7 to 11 years at four time points over a year (November 2019-November 2020). Seasons (3- and 5-month intervals) were classified as winter (November-January), winter-spring (January-June), and summer-autumn (June-November).