Answer :
Final answer:
Adding AR coating to photochromic lenses enhances visual clarity by reducing glare, without significantly altering the lens's darkening effect, scratch resistance, or weight.
Explanation:
Adding an Anti-Reflective (AR) coating to photochromic lenses does not increase or reduce the darkening effect caused by exposure to UV light. Instead, the purpose of an AR coating is to reduce glare and reflections on the surface of the lenses, thus enhancing visual clarity and comfort. The darkening effect in photochromic lenses is triggered by organic microcrystalline molecules that respond to UV light, and this process is not directly influenced by the presence of an AR coating. Regarding the options provided, the closest answer to the effects of adding AR coating would be that it improves the experience of wearing photochromic lenses, but it does not affect the scratch resistance or the weight of the lens significantly.
