Some 135 million people around the world wear contact lenses to correct vision irregularities, according to the Mayo Clinic. Contact lenses are minuscule plastic discs that are placed on the eye. According to Eye Topics.com, disposable contact...
The design of contact lenses determines when it is time to throw them out. Daily-wear lenses mean just that, you wear the lenses for one day, and then replace them. However, some disposable lenses work for extended periods. Eyes produce proteins...
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...
Contact lenses give you a great alternative to bulky, uncomfortable glasses. Available only by prescription, there are several kinds to choose from. Your optometrist will measure your pupil and cornea, therefore giving her a clear idea of the type...
People who need bifocals no longer have to wear little half-glasses in addition to their contacts. According to the Contact Lens Manufacturers Association, multifocal contact lenses are available in bifocal, trifocal and progressive levels....
Around 135 million people worldwide wear contact lenses, small corrective plastic discs that sit on the surface of the eye, MayoClinic.com reports. While contacts have many benefits, they also have many drawbacks and can cause serious...
Toric contact lenses correct astigmatism caused by a slightly irregular-shaped cornea. They differ from regular lenses in that toric contact lenses have two powers: one to correct astigmatism, the other to correct near-sightedness or...
A contact lens is a thin piece composed of various plastics placed directly over your pupil to correct nearsightedness, farsightedness or astigmatism. There are many different types of contacts, including Toric (for astigmatism), bifocal (for...
Approximately $8 billion was spent on eye in the United States care in 2009, according to reports from market research company IBIS World, with more than 20,000 establishments and companies offering prescription reading eyeglasses and contacts in...
Contact lenses fit snugly in the eye to correct vision without the need for wearing traditional glasses. The original concept for lenses was first proposed by Leonardo da Vinci in the early 1500s. It took approximately 270 years to design a...
Swimming masks and goggles cover your eyes, and sometimes your nose, to prevent your vision from being affected while underwater. Depending on the water activity that you're participating in, you may need to choose one mask over another. Always...
Contact lenses change your vision without also changing the look of your face. They're more convenient than glasses during workouts, bad weather and water sports. Still, if you don't change them when you're supposed to, that convenience can be...
Contact lenses are a convenient alternative to traditional eyeglasses and can be used to improve vision whether you are nearsighted or farsighted. Several types of lenses are available, including disposable, extended wear, bifocal and colored...
Focus contact lenses include the DAILIES line produced by Ciba Vision. DAILIES are disposable lenses designed to wear for one day. Focus contacts also are available in weekly or monthly disposable versions. The lenses are made with a moisturizing...
Eyelid inflammation usually occurs when the follicles at the edge of the eyelid that your eyelashes grow from become infected. An infected follicle causes the rest of the eyelid to become inflamed, red and sore. Dirt and smog in the air, eye...
When you are told by your eye doctor that you need contact lenses, you may need to decide between hard contact lenses and soft contact lenses. Traditional hard contact lenses made from glass or polymethyl methacrylateas (PMMA) are mostly obsolete,...
Acuvue is a registered trade name for a brand of the first disposable contact lenses that became available on the market in the 1980s. Although they are disposable daily lenses, they can be worn up to 7 days. Acuvue 2 is an upgraded product that...
Contact lenses are an option for many people who need vision correction but do not wish to wear glasses. Typically, eye care professionals will provide patients with a copy of the prescription required to purchase lenses through retail vendors,...
If you wear contact lenses that are not designed to be worn overnight, your optometrist has probably warned you against sleeping in them. Sleeping in contact lenses may harbor bacteria or scrape the eye, causing an infection. If you experience eye...
Seasonal and other allergies can produce burning, tearing, red and sore eyes. Eye redness and swelling caused by allergens is called allergic conjunctivitis. In many cases, you can treat your sore eyes at home by making simple lifestyle changes to...
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...
Contact lenses are used to help correct vision problems. Although they do not fix the problem, they are placed over the eye and assist the wearer in seeing more clearly. These thin lenses lay over the cornea, and correct visibility problems....
Conjunctivitis, commonly called pink eye, occurs due to inflammation of the conjunctiva, the membrane that lines the eyelids and the white part of the eye. The condition may affect one or both eyes and is particularly common in children, according...
Although some types of contact lenses are made to wear for extended periods of time, most conventional lenses are designed for daily wear and must be removed for cleaning and disinfecting every night before you go to sleep. Sleeping in contact...
Toric contact lenses are usually prescribed to correct astigmatism, a common vision problem. Toric lenses have special curves to help compensate and correct for astigmatism.
Wearing contact lenses give some people the much desired freedom to wear sunglasses or participate in sports without glasses obstructing their view. However, contact lens use requires care and periodic follow-up with an eye care professional....
Astigmatism is a common vision problem. The cause of an astigmatism is a cornea or lens that is irregular in shape--usually the cornea. An astigmatism may be accompanied by near-sightedness or far-sightedness. You may not even know you have this...
Farsightedness, medically known as hyperopia, is a condition that results from a flat cornea or short eyeball length. With farsightedness, light rays enter the retina before the eye is able to focus on anything. As a result, images focus on the...
