If you spend more than three hours a day in front of screens you may experience dry, tired or red eyes and headaches due to blue light exposure. These anti-reflective glasses provide added comfort. Note: the frame does NOT allow mounting prescription lenses. The lenses have a protective coating that attenuates UV and blue light in the 390-440 nm spectrum. These are not corrective (no diopters); the frames are modern, lightweight and durable. Accessory