If you've ever noticed someone wearing sunglasses outdoors and as he goes indoors, the lenses lighten, the person is most likely wearing what are commonly called "transition" lenses. Photochromic, or transition, lenses use a special technology...
If you hate carrying one pair of glasses for indoors and another for outdoors, eyeglass lenses that darken in sunlight may be the answer to your prayers. These light-changing lenses are called photochromic or photochromatic, but the Transitions...
Photochromic eyeglass lenses darken when you wear them outdoors, removing the need for sunglasses or clip-ons. Color-changing lenses are available from many companies, though the technology behind the most popular brands is owned by Transitions...
Toric lenses are contact lenses prescribed to correct astigmatism. Astigmatism, a common vision disorder, results when light hits the back of the eye in two focal points instead of one spot. Toric lenses redirect the light coming into the eye and...
Safety lenses are a must for any sport, but especially games that involve impact potential like volleyball. Several factors determine the type of lenses you need, such as personal preference and tolerance of lens color, and whether you are playing...
Red, irritated, itching or burning eyes are bothersome and sometimes signal a serious problem for contact lens wearers. Dirty or torn lenses lead to corneal infection, affecting the front surface and other parts of the eye. The National Eye...
Athletes need optimum vision and comfort for the best performance results. Glasses are cumbersome and not always practical, especially under helmets or during active sports and games. Contact lenses offer quite a few advantages for an active...
Contact lenses are able to treat a variety of eye problems by compensating for deficiencies in the eyes ability to focus light. Aspheric contact lenses are a special variety of contact lens that has somewhat different properties compared to...
Making the transition from glasses to contacts may take some practice as you learn to properly care for your new lenses. With help from your optometrist, you can learn more about the care needs for the specific type of lenses that you use. Most...
A number of options exist for those seeking correction of poor eyesight. Myopia, or near-sightedness, and presbyopia, or far-sightedness, can both be addressed through the use of corrective lenses or surgery. Eyeglasses appeal to those who are...
Contact lenses are formed out of plastic polymers. Soft contact lenses use poly hydroxyethyl methacrylate while hard contact lenses use polymethyl methacrylate. The materials are either cast in a mold or cut in a lathe to make contact lenses.
The method used for making contact lenses often is dependent upon the type of contact lens. There are three chief contact lens types: soft, gas permeable or hybrid lenses. Soft contact lenses are made in order to retain their flexible properties...
Cleaning the lenses on your eyeglasses is not difficult, but it is essential. Dirt that builds up on the surface of the glass will not only obscure vision but may scratch the lens. In addition to dust, lenses accumulate oil from skin and finger...
Contact lenses, or contacts, are thin pieces of rigid or flexible plastic that can be applied to the cornea of the eye. They can be used to serve a variety of purposes. They may be used correctively in the same way as glasses, therapeutically to...
Multifocal contact lenses give people the ability to see near and far distances without the need for glasses. Although many find these contacts useful, they are not for everyone. People interested in using multifocal contact lenses should explore...
A cataract describes a clouding of the eye lens, which focuses images on the nerve tissue at the back of the eye. A significant cataract causes loss of visual clarity and dimmed vision. The definitive treatment for a cataract is the removal of the...
According to the American Academy of Ophthalmology, 24 million Americans wear contact lenses. While most of this population consists of adults, many older children also wear contact lenses. Contact lenses offer distinctive benefits for children...
According to the American Optometric Association, "Contact lenses are among the safest forms of vision correction when patients follow the proper care and wearing instructions provided by their eye doctor." Wearing contact lenses offers many...
For many people who require vision correction, eyeglasses are essential for having the best vision possible. Attractive and well-maintained eyeglasses are also an important part of a person's appearance. Your eyeglasses are a significant...
The raw materials for contact lenses differ depending on the type. Manufacturers use hydroxyethyl methacrylate to craft soft contact lenses. They use a stiffer material called polymethyl methacrylate to make hard contact lenses. Both are plastic...
Eyeglasses can be expensive and if you have insurance coverage, your vision plan may only allow for a new pair of eyeglasses every couple of years. To prolong the life of your eyeglasses, remove scratches that have appeared on the lenses. If you...
Contact lens wearers should take certain steps to maintain their eye health and lens quality no matter which type of lens they wear: disposable, daily wear, extended wear or gas permeable. Proper care minimizes the risk of eye infection, makes...
Bifocals began when Benjamin Franklin had the lenses of two different spectacles cut in half and wired into a single frame. As technology has advanced, more complex lens configurations were created, with multiple areas of magnification, called...
Contact lenses are designed to enhance your vision without the need for glasses. Although not all eyes and vision problems are suited for contacts, most of the time, contacts can be comfortably worn without problems or complications. However, some...
Implantable contact lenses, or ICLs, offer an alternative for people who are not candidates for refractive eye surgery. ICLs correct vision in the same manner as regular contact lenses. The difference is that ICLs are permanent. An ophthalmologist...
Your glasses are important for reading, protecting your eyes or correcting your vision. Sometimes, the eyeglass lenses can get damaged or scratched due to sitting or dropping them. Or, sometimes the screws come loose, and your lens falls out....
Astigmatism is an eye problem that optometrists can correct with the right lenses. Get professional tips and advice on eye problems and optometry in this video.
It is important to be aware of safety issues when cycling. Learn how to avoid injuries when cycling in this video.
Pink eye (conjunctivitis) is an inflammation or infection of the transparent membranes (conjunctiva) that line your eyelid and part of your eyeball. The cause of pink eye is commonly a bacterial or viral infection, an allergic reaction or, in...
Learn about ski goggles in this free beginner skiing lesson on video.
Vision is everything when fly fishing. Learn how to pack equipment, including polarized glasses, to go fly fishing with these video instructions.
