Based on the reference provided, "HD" sunglasses, particularly the inexpensive kind retailing around $10, may not live up to the "high-definition" claim. While they might provide some clarity, they are unlikely to perform as well as advertised. The video suggests spending slightly more to get polarized lenses, which offer better glare reduction and clarity.
Essentially, if HD sunglasses work as intended (and the reference implies the cheaper ones often don't), they likely work by:
- Filtering Light: Similar to other sunglasses, they reduce the amount of light reaching your eyes, decreasing brightness and strain.
- Contrast Enhancement: They may be designed to enhance contrast, making objects appear sharper and more defined. This is likely achieved through specific lens tints and coatings, though this is not specified in the reference.
However, the key takeaway from the provided reference is a note of caution. The video suggests that "HD" sunglasses in the lower price range ($10) are unlikely to provide the dramatic improvements in vision that their marketing might suggest. Polarized lenses, which can be found for a slightly higher price, are generally considered more effective for improving clarity and reducing glare.
