- Blue light is present both in sunlight, between the ultraviolet and visible spectrum, which is already harmful in itself, and in artificial light. It is present in LED lighting, in tablets and smartphones.
- In vitro tests have clearly shown that blue-violet light causes a detrimental impact on retinal cells.
- Prevention should be practiced since school age and then continue in adulthood, as well as in old age, for various reasons.
- The fundamental concept is that blue light should be divided into two bands: blue-violet and blue-turquoise.
Dr. Francesco Loperfido is Head of General Ophthalmology, Department of Ophthalmology, University Vita‐Salute Scientific Institute San Raffaele, Milano, Italy