Sunday, December 12, 2010
Contact Lenses For All Ages
Contact lenses, like spectacles or refractive surgery, can correct your short-sightedness, long-sightedness, and astigmatism.While some people enjoy the fashion statement of eyeglasses, others prefer their appearance without them. Contact lenses can achieve this without irreversible surgery.
Contact lenses can also provide a full field of unobstructed vision.Contact lenses have been around for more than 100 years. During that time, many advancements have been made that allow just about everyone to wear contact lenses. If you were told in the past that you couldn't wear contact lenses, odds are that's not true today. There are more convenient and healthy contact lens options than ever.If you're new to contact lenses, your first step is to talk to us at GlamourEyes. In Australia, contact lenses are a prescription item, just like pharmaceuticals. They must be prescribed and properly fitted by a qualified Optometrist.I will evaluate your visual needs, your eye structure, and your tears to help determine the best type of lens for you.
The many types of contact lenses currently available can be grouped in various ways according to: What they're made of; How long you wear them without removal; How often you dispose of them; The design of the lens; Contact Lens MaterialsClassified by material, there are two main types of contact lenses:
Soft lenses are made from gel-like, water-containing plastics, and are most common. They're a bit larger in size than your iris (the colored part of your eye).
RGP lenses( Rigid Gas Permeable) or "oxygen permeable" lenses, are made from rigid, waterless plastics and are especially good for unsuccessful soft lens wearers and high astigmatism. These lenses are smaller than soft lenses and your iris( coloured part of your eye).Silicone hydrogel lenses (breathable lenses) have become the contact lenses of choice for many eye care practitioners, because they allow more oxygen to pass through the lens to the eye, and they are less prone to dehydration.
Contact Lens Wearing Time
Until 1979, everyone who wore contact lenses removed and cleaned them nightly. The introduction of "extended wear" enabled wearers to sleep in their contacts. Now, two types of lenses are classified by wearing time:
Daily wear — must be removed nightly
Extended wear — can be worn overnight, but usually not recommended by GlamourEyes since it increase the chances of infections and lens dryness.Disposal Intervals for Contact LensesOne problem with soft contact lenses is that proteins and lipids — which are naturally found in tears — adhere to the surface of the lens, sometimes causing discomfort and providing hiding places for infection-causing germs.Lens-cleaning products help. But over time buildup still occurs, necessitating lens replacement.
Disposable lenses, first introduced in 1987, address this problem in different ways. (Note that, although "disposable" generally means single-use, this is not always true regarding contact lenses.)Here are the options:1 day disposable: replaced every dayMonthly Disposable (used for daytime or overnight wear) replaced every four weeksTwo weekly Disposable (used for daytime or overnight wear) replaced every fortnight
Contact Lens Designs
Many lens designs are available to correct various types of vision problems:Spherical contact lenses are the typical, rounded design of contact lenses, which can correct short-sightedness or long-sightedness.Toric contact lenses correct for astigmatism, as well as for myopia and hyperopiaBifocal or Multifocal contact lenses contain different zones for near and far vision to correct presbyopia, which is the age-related, decreased ability to obtain a full range of vision.Orthokeratology lenses are specially designed to reshape the cornea during sleep, providing lens-free daytime wear.
More Contact Lens Features Colored Lenses.
Many of the types of lenses described above also come in colors that can enhance the natural color of your eyes — that is, make your green eyes even greener, for example. Or these lenses can totally change the eye's appearance, as in from brown to blue.UV-Inhibiting Lenses. Today, many contacts incorporate an ultraviolet blocker in the lens material, to cut down on UV light that can eventually cause cataracts and other eye problems. You can't see this blocker by looking at the lens. And since contacts don't cover your entire eye, UV blockers cannot substitute for traditional sun protection like good quality sunglasses.Which Contact Lens Is Right for You?First, your contacts must address the problem that is prompting you to wear lenses in the first place. Your contact lenses must provide good vision by correcting your short-sightedness, long-sightedness, astigmatism, or some combination of those eye problems.Second, the lens must fit your eye. To do that, lenses come in tens of thousands of combinations of diameter and curvature. Of course, not every lens brand comes in every "size."Your Optometrist at GlamourEyes is skilled in evaluating your eye's physiology, and your eyesight, to determine which lens best satisfies the two criteria above.Third, you may have another medical need that drives the choice of lens. For example, we might pick a particular lens if your eyes tend to be dry.
Caring For Your Contact Lenses.
Cleaning, disinfecting and storing them is much easier than it used to be. A few years ago, you would have needed several bottles of cleaning products, and perhaps enzyme tablets, for proper care. Today, most people can use "multipurpose" solutions meaning that one product both cleans and disinfects, and is used for storage. Some people who are sensitive to the preservatives in multipurpose solutions might need preservative-free systems, such as those containing hydrogen peroxide. Of course, you can avoid lens care altogether by using daily disposables.
Contact Lens Problems
Trial and error often is involved in finding the perfect lens for you. People react differently to various lens materials and cleaning solutions. Also, the correct "parameters" of your lens that is, power, diameter, and curvature can be finalised only after you've successfully worn the lens. This is especially true for more complex fits involving extra parameters, such as with bifocals or toric contact lenses for astigmatism.If you experience discomfort or poor vision when wearing contact lenses, chances are that an adjustment or change of lens can help. Today, more contact lens choices than ever are available to provide comfort, good vision, and healthy eyes. If you're not feeling good and seeing well, ask your us her at GlamourEyes for help.
Monovision or Multifocal Contact Lenses
Bifocal or multifocal contact lenses may not be for everyone. Because the eye needs time to adjust to sorting out the different powers, it takes some time to adjust to the lenses. Some people will have visual needs that are not satisfied by the current variety of bifocal contacts.If that's the case, you may still be able to wear contact lenses and see clearly, even if you have presbyopia. We may recommend monovision as an option.How Monovision Works?With monovision, you wear one contact lens with one power to correct distance vision and the other contact lens with one power to correct near vision. The distance vision lens is usually worn in your dominant eye.While monovision may appear to be an unusual choice, most people actually accommodate well to it, and eventually don't even notice that each eye is responsible for a different part of their vision. Because each lens has only one power, we can prescribe any of the currently available spherical lenses for monovision, including all of the current disposable lens options.
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