Coming to Terms with Contact Lenses’ Prescriptions and Their Expiration

Despite all the information available about contact lenses, there is still one area where misconceptions crop up concerning the nature of contacts and their use: prescriptions and their expirations.

Eye doctors and contact lens sellers remain surprised that a good number of people continue to ask why they need a prescription to wear contact lenses. In cases like these, the prevailing notion seems to be that contacts are somehow just a fashion accessory and not the controlled medical devices that they are. It is true that patients have been given greater freedom to shop around for their lenses since the federal government required that contact wearers have a copy of their prescription. However, this freedom may have fostered assumptions that contacts have become less controlled. No one would think of taking a medication to treat a serious illness without benefit of a doctor’s prescription because that medication must be monitored so it will do no harm. The same holds true for contacts. A lens that fits poorly, is not perfectly matched to your vision power, or is made from material not best suited for your eyes will cause problems. Not only is discomfort a most likely result, but inflammation, infection, and permanent damage to eye tissue are also risks.

Once you have the proper prescription it is important to remember that it is subject to expiration, in most cases after one year. Your eyes may continue to feel good and lens wear remains comfortable, but there could be microscopic changes in your eye health that are not noticeable. An annual exam with your eye doctor assures that any potential problems with your eyes are caught and corrected before they become serious. These regular exams also keep up with how your lenses are performing and allows for any required updates in regards to power, size, material, or design.

In addition to prescription expiration, soft contact lenses themselves have a time limit placed on them. Despite the airtight packaging used on most brands of soft contacts, the passage of time may weaken or compromise the seal. This leads to contamination of the sterile saline solution and the lens inside. Expiration dates can be found on the box and on the lens’ foil wrapper. Dates are printed in a year-month format, meaning the contacts within can be used until the last day of the month in the calendar year indicated (e.g. 2014/12 means you can use the lenses until December 31, 2014). Once an expiration date has been reached, discard the lenses immediately and obtain fresh ones.

Contact lenses provide great convenience and comfort regarding vision correction, but it is important to remember that they also impact a most sensitive part of our bodies, the eyes. Regular and timely visits with your eye doctor are necessary to maintain eye health and to make sure they are enhanced--not harmed--by the contacts we choose.

Ending Discomfort Associated with Contact Lenses

The ongoing advance of contact lens technology in recent years has made the wearing and enjoyment of contacts more widespread. Nevertheless, there may be instances where discomfort may occur in some people’s use of lenses. In most situations where this is an issue, there are relatively simple solutions.

Eyes that burn when contacts are inserted are many times due to substances that get on the lenses through handling. Skin lotions, cosmetics, food oils, and soaps with additives (e.g. moisturizers and perfumes) can easily find their way onto your contact lenses. Search out ‘basic’ or ‘all natural’ soaps for use and make sure your hands are thoroughly dried with a lint-free towel before handling your contacts. Daily disposable lenses go a long way to cut down on contamination because you use them once and then throw them away.

Foreign body sensation (the feeling that something is in the eye) when wearing contacts could be a sign that your lens fit may not be just right. This cause may be as simple as inverted lenses, a nick at the edge of the lens, a torn lens or an incorrect base curve or diameter. Lipids and natural deposits left on lenses due to tear production is another factor, and can be removed with the proper cleaning solution. Your eye doctor can help you with the correct fitting and care regimen necessary.

Dry eyes while using contact lenses can possibly be solved by having your current lens fitting reevaluated by your eye doctor. A switch to contacts better suited for dry eye symptoms (silicone hydrogels are one type) may be recommended. Certain eye drops used for dryness in conjunction with lenses are available. High intakes of caffeine and alcohol contribute to the problem, so a moderation in their consumption may help.

Silicone hydrogels have also come to the rescue of those who find they cannot wear their lenses as long as they would like each day. These soft lenses have increased wear time due to their high rate of oxygen flow to the cornea, which also promotes good eye health in addition to comfort.

Other factors that affect contact lens comfort are the presence of allergies, medical problems, and the use of some prescription medications. Smoking raises a whole host of health complications associated with vision.

The most important thing to remember is that discomfort in most cases does not mean having to give up your contact lenses. Meetings with your eye doctor will very likely result in greater satisfaction and enhanced visual freedom.