Lenses
Explore practical information from CCSPACE.
Blue-light lenses
Blue-light lenses filter part of the blue light from screens and daylight. Some people like the slightly warmer view, but they are a comfort preference, not a medical treatment.
Lenses and coatings
Lens index decides how thin a lens can be, and coatings decide how it handles reflections, scratches and smudges. Your prescription, frame size and centration matter as much as the index you pick.
Lenses for driving
The most important lens for driving is an up-to-date distance prescription, kept clean and scratch-free. Tints and polarized lenses can help in bright daylight, but nothing dark should be worn at night.
Photochromic lenses
Photochromic lenses darken outdoors in ultraviolet light and clear again indoors. They suit people who move between inside and outside often and would rather not carry a second pair.
Polarized lenses
Polarized lenses block the horizontal glare that bounces off water, snow and roads. They make bright days more comfortable and are best suited to sunglasses rather than everyday clear lenses.
Progressive lenses
Progressive lenses change power gradually from distance at the top to reading at the bottom, with no visible line. They let you see far, at arm's length and up close through one pair, once the fit and your habits are right.
Reading lenses
Reading lenses are made for close work such as books, phones and crafts. A prescription pair accounts for each eye separately, including astigmatism, which ready-made readers do not.
Single vision lenses
Single vision lenses carry one prescription power across the whole lens, set for one viewing distance. They suit most people who need glasses for distance, for a screen or for reading, but not all three at once.