A comprehensive review of experimental models for investigating blue light-induced ocular damage: Insights into parameters, limitations, and new opportunities

Light-emitting diodes (LEDs) are widely used in modern lighting and electronic devices, including smartphones, computer monitors, tablets, televisions, and vehicle lights. Blue light (BL) hazards to eye health have received increasing attention because white LED bulbs emit higher levels of BL than traditional lighting sources. At wavelengths of 400 -500 nm, BL is characterized by its high energy and risks associated with prolonged exposure, which may lead to photochemical damage and morphological alterations in the retina. Recent research has revealed that the harmful effects of BL are intricately linked to light intensity and exposure frequency, with mechanisms involving the overproduction of reactive oxygen species through photooxidative processes. This growing body of knowledge deepens our understanding of photodamage and opens avenues for exploring protective strategies for our eyes. Although current clinical trials assessing the safety of BL exposure remain limited, the development of experimental models that mimic physiological conditions has revealed BL toxicity. This review categorizes and evaluates BL-induced retinopathy in vivo, providing a comprehensive overview of the associated experimental parameters, including photosensitive fluorophores, light wavelength, illuminance, irradiance, exposure duration, animal strains, and their unique lesion patterns. Moreover, this study underscores the need for further research to evaluate photoprotective agents, which may offer valuable insights to the ongoing discussion on preserving ocular health in our increasingly illuminated digital environments.