A dim light can cause retinal damage if exposure is sufficiently prolonged
Multiple scientific studies demonstrate that prolonged exposure to even relatively low levels or intensities of light can induce irreversible retinal damage and photoreceptor degeneration over time.
The claim is specific, empirical, and falsifiable. Papers [0], [1], and [2] provide direct evidence from clinical and animal models showing that prolonged exposure to low-level or continuous light sources can result in retinal and photoreceptor damage. No papers refute the claim.
Huanyu Liu, Yuan Yang, Jingli Guo, Jie Peng, Peiquan Zhao. Retinal Damage After Repeated Low-level Red-Light Laser Exposure. 2023. https://doi.org/10.1001/jamaophthalmol.2023.1548
This case report documents retinal damage caused by repeated exposure to low-level laser light in a patient.
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W. Keith O'Steen, Charles R. Shear, Kenneth V. Anderson. Retinal damage after prolonged exposure to visible light. A light and electron microscopic study. 1972. https://doi.org/10.1002/aja.1001340103
This classic study demonstrates that prolonged exposure to low-intensity visible light leads to irreversible degeneration of retinal photoreceptor cells.
W. Dale Stevens, Teresa Fortin, Bruce A. Pappas. Retinal and Optic Nerve Degeneration After Chronic Carotid Ligation. 2002. https://doi.org/10.1161/01.str.0000014204.05597.0c
This animal model study shows that chronic exposure to light contributes significantly to the death of retinal photoreceptors following ischemic damage.
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