Exposure to red light can offset some of the vision loss related to age-related macular degeneration, or simply age-related visual decline. The photoreceptors that convert photons into electrical signals, the rest of the visual system can understand. So I'm not telling people to throw off or get rid of their corrective lenses and contacts but you can be overly reliant on these things like a crutch in a way. And certainly in the case of prism lenses, what I mentioned before is a real consideration - it's one I'm very familiar with.

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