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This study aimed to examine the influence of morning bright light therapy upon choroidal thickness in healthy young adults. Studies have demonstrated that choroidal thinning accompanies the development and progression of myopia (Read, S., Fuss, J., Vincent, S., Collins, M., & Alonso‐Caneiro, D. (2018). Choroidal changes in human myopia: insights from optical coherence tomography imaging. Clinical And Experimental Optometry, 102(3), 270-285. doi: 10.1111/cxo.12862)


Twenty-three healthy young adult subjects aged between 20 to 29 years (mean ± SD age 22.2 ± 2.2 years) participated in this study and had a series of choroidal thickness measurements collected before, and then following a 1-week period of increased daily light exposure (induced through the daily use of light therapy glasses).


This study provides the first evidence in the human eye, that increasing daily light exposure through 30-minute light therapy sessions in the morning for a 7-day period, results in a small magnitude but statistically significant increase in choroidal thickness.

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