Abstract
The incidence of myopia has increased rapidly in recent decades, suggesting that environmental factors, such as light, may be an important cause. Correlated color temperature (CCT) is a commonly used index to quantify the spectral composition of light. Here, we used 32 juvenile monkeys (16 females and 16 males) and selected four kinds of light with typical but different CCTs to study the relationship between CCT and ocular axial elongation. After 365 days of observation, ocular axial elongation under low-CCT light was smaller than that under high-CCT light and this effect was robust and stable over the entire observation period. As excessive axial elongation is the main cause of juvenile myopia, these results provide a new approach for the prevention of juvenile myopia.
Highlights
The incidence rate of myopia has been increasing rapidly in recent decades, suggesting that environmental factors, such as light, may be a leading cause 1
As excessive axial elongation is the main cause of juvenile myopia, these results provide a new approach for the prevention of juvenile myopia and establish a scientific foundation for introducing appropriate lighting standards in schools
We demonstrated that light-emitting diode (LED) lights with different Correlated color temperature (CCT) had different effects on ocular axial growth in juvenile monkeys (Fig. 1A, F2, 45 = 4.711, P = 0.014)
Summary
The incidence rate of myopia has been increasing rapidly in recent decades, suggesting that environmental factors, such as light, may be a leading cause 1. Given the importance of the spectral composition of light to the occurrence and development of myopia [3,4,5], its transformation in artificial lighting may be related to the increase in myopia incidence. Regarding effects on human subjects, most studies have explored the impact of CCT on visual comfort and fatigue under different artificial lighting conditions [6,7,8,9,10,11,12], with the relationship between CCT and myopia development yet to be clarified. No direct study on the relationship between daily lighting CCT and myopia development in animals either
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