discolored in strong reading resistant to harmful does not discolor under light or indoors [PLOPLO] Round, dimmable, sunlight, varifocal, progressive,

Many customers have reported that their eyeglass lenses are not discolored. The reasons are: 1. Outdoor lenses turn dark gray in strong sunlight, but do not discolor under lamplight, indoor lenses do not discolor; 2. Outdoor lenses turn light gray in faint sunlight, and the color is not noticeable; 3. When it is cloudy outdoors or there is no sunlight, the lenses do not discolor, indoor lenses do not discolor; Principle of eye protection by lens discoloration: 1. In order to prevent ultraviolet rays on the eyes outdoors, the lens detects the ultraviolet rays of the sunlight and discolors. The stronger the sunlight, the stronger the ultraviolet rays, and the faster the lens discolors and the darker the color; 2. On days when the outdoor sunlight is weak, cloudy or rainy days, or days when the ultraviolet rays are weak, the lens will not turn light gray or discolor; 3. Indoor lighting has no ultraviolet rays, and the indoor lens will not discolor; The three uses of glasses: 1. The middle and top part of the glasses have a small degree of strength and are used for seeing things in the distance; 2. The middle part of the glasses are used when you want to keep your eyes flat and watch TV or a computer; 3. The middle and bottom part of the glasses have their own strength (for example, if you buy a pair of +150 glasses, the bottom strength is +150) and are used for reading. If you are using these bifocal reading glasses for the first time, it usually takes about a week to get used to them. However, bifocal reading glasses are not suitable for everyone. If you are not satisfied with the quality, you can submit a return request within 30 days and receive a full refund.