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...
Eye contact lenses were first developed in the 1960s, and have continually improved. The early contact lenses were known as hard contact lenses. That is, these lenses were rigid. They were made of a plastic called polymethyl methacrylate (PMMA)....
Contact lenses are as diverse as the patients that wear them. What type of contact lens one patient ranks as number one versus what another patient likes best is an individual choice. Some patients' eyes will only tolerate single use lenses while...
Contact lenses have evolved in leaps and bounds since the first polymethyl methacrylate hard lens was introduced in the 1940s, with newer materials such as silicone-hydrogel offering greater comfort, ease and extension of wear. However, while...
People with vision abnormalities often consider using contact lenses or laser eye surgery instead of eyeglasses. There are several facts to keep in mind about these methods of vision correction when making a decision between them.
The Acuvue Oasys with Hydraclear Plus contact lens is a soft contact lens that is used to treat both near- and farsightedness. People with nearsightedness need correction to see objects that are far away, while those with farsightedness need...
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....
Contact lenses are small plastic discs that correct visual problems much like glasses do. In 1837, Swiss physician Dr. Fick and optician Edouard Kalt developed the first glass contact lens. Today, the contact lens can change your eye color as well...
It's all too easy to forget you're wearing your contact lenses when you drift off to sleep for a short nap, but you probably won't forget about them upon waking. Most lens wearers have experienced the dry, irritable feeling of contacts left in...
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...
Contact lenses are round plastic disks meant to fit over the eyes to correct faulty vision. According to doctors at the University of Michigan Kellogg Eye Center, the plastic orbs are able to cling to the tears on the cornea with surface tension,...
Contact lenses offer an attractive alternative for those who have vision defects but prefer not to wear glasses. There are a wide variety of different contact lenses on the market. Some are geared to special vision needs, others offer...
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...
Contact lenses are small, disc-shaped pieces of plastic that are placed on the surface of the eye. They are worn primarily to provide vision correction for several eye problems. Contact lenses are often chosen as an alternative to eyeglasses...
The eyes need to breathe, just like any other body surface. Contact lenses keep the renewing movement of air from reaching the important parts of the eye, which is necessary for good vision. Even extended wear lenses should be removed regularly....
Acuvue 2 contact lenses are disposable prescription lenses made by Johnson & Johnson Vision Care. Made from a soft silicon material called etafilcon A, Acuvue 2 contacts allow oxygen to pass through the lens and to the cornea of the eye. This...
Contact lens overwear syndrome occurs when contact lenses are worn for too long. In contact lens wearers, the amount of oxygen that the cornea receives decreases, and if the contact lens is worn for too long, the cornea develops problems. In many...
Pink Eye, or conjunctivitis, is a condition characterized by the infection or swelling of the membrane called the conjunctiva that covers the inside of the eyelids and the white portion of the eye. Irritation and swelling causes blood vessels in...
When it comes to contact lenses, one type no longer fits all. Contact lenses have come a long way since the hard plastic lenses of the 1950s. Today, in addition to hard lenses (vastly improved from those of 50 years ago), there are soft lenses...
Contact lenses have become an increasingly popular alternative to glasses for corrective vision since they first hit the market in 1979, according to EyeTopics.com. Innovations in lens type and comfort have made contact lenses more versatile, less...
While contact lenses are designed to enhance your vision, they can also cause problems with your eyes. Dry eyes and irritation are common issues that occur in contact lens wearers, according to the American Optometric Association. Lubricating...
Almost everyone has to use optical aids like bifocals for reading by the age of 50. Presbyopia is the gradual loss of the eye's ability to adjust and focus when trying to read or see up close, according to the National Eye Institute. Luckily,...
Extended wear contact lenses are U.S. Food and Drug Administration approved for overnight wear without removal for seven to 30 days depending on the type of lenses prescribed. Generally, lenses are categorized as rigid, gas-permeable or soft. Soft...
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,...
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...
There are a variety of contact solutions available. Ultimately, the biggest factor that is going to influence the kind of contact solution you buy is the type of contacts you wear. Hard and soft lenses require different methods of cleaning;...
The purpose of the inner layer or the endothelium of the cornea is to pump the fluid out of the cornea and keep it clear. When the endothelial cells stop working, the cornea swells; this is called corneal edema. The endothelial cells can be...
Contact lenses can be used to correct visual acuity in people who are nearsighted (myopic), farsighted (hyperopic) and have irregular corneas (astigmatism). According to the Association of Contact Lens Manufacturers, there are 31 million people in...
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...
