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Contact lens prescriptions should come from a qualified eye care specialist. This is especially true with the contact lenses that are used either corrective or therapeutic. Stores would require a prescription before they sell a pair.

Here are the things that you have to look for in a prescription to determine its validity:

1. The patient's name should appear in it. This important detail would prove that the person who has the prescription has gone through the necessary procedures essential to determine the right pair of contacts he or she has to get.

2. The date of the examination. The examination date has to be current. This ensures that the prescription is freshly made and that the patient is recently examined. This is very important in therapeutic contact lenses.

3. The issue date and the date of expiration of the prescription. These two sets of dates are equally important as the examination date. This solely determines if the prescription is still usable.

4. The doctor's information. To further assure the manufacturers and the sellers of the prescription's validity, they can proceed to call the doctor who made the prescription. They can do that to clear out anything that maybe vague or questionable to them.

5. The lens's power. The contact lens's power corresponds to its sphere, cylinder, or axis, when applicable. This detail is essential to determine the right pair for the intended user.

6. The material or the manufacturer of the lens. Contact lenses can be made of different materials. Some are made of Plexiglass, while some use Hydrogel. Most of the time, the brand of the contact lenses is enough to determine what kind of material is used.

7. The base curve and the diameter of the contact lens. These are the specifics of the lenses one is to buy. Here goes the actual specification as prescribed by the attending eye physician. These are determined by the tests conducted to the patient.

8. The contact lens's manufacturer information. In case the doctor prescribed a private label contact lens, this information is needed. It would help the seller to verify the exact pair you have to get.

These are what compose a contact lens prescription. Each component is important, because it will lead you to the perfect pair. And more importantly, these are the requirement of the FTC. Contact lenses are still considered medical devices, even though if it is used for aesthetic purposes. That's why contact lens prescriptions, with all these information, are a requisite.

For vital information on all things concerned with contact lenses visit Contact Lens

Contact Lens Types

Soft contact lenses have been released in many different formats since they were first developed in the 1960s.

Soft contact lenses were originally designed to be worn for 12 to 18 months and removed nightly. These contact lenses are now called "conventional soft contact lenses". They are usually prescribed as a specialty lens and are generally used when frequent replacement or disposable contact lenses are not available. They have the disadvantage of being more expensive and tend to accumulate surface deposits. This mode of lens wear requires more diligence with cleaning and care.

Disposable contact lenses were first released commercially in the 1980s. The first disposable lens was the Johnson and Johnson Acuvue contact lens, which was a 2 week disposable contact lens. It was a soft hydrogel lens and was primarily worn on a daily basis. The original Acuve contact lenses has only recently been discontinued. It was designed to be replaced after 2 weeks of daily wear.

Soft disposable silicon hydrogel contact lenses were first available in the 1990s. The first silicon hydrogel lenses offered were the B&L PureVision and Ciba Focus night & Day lens. Both these lenses are approved for one month extended wear. Silicon hydrogel contact lenses have the advantage of greater oxygen permeability then the original hydrogel contact lenses. Approximately 98% of patients are able to wear this type of contact lens. There is however, a slightly increased chance of developing microbial keratitis or corneal ulcer with this mode of wear. Some studies place the risk at one in five hundred per wearing year.

The next generation of silicon hydrogel soft disposable contact lenses saw the release of Ciba Optix O2 and Johnson and Johnson Acuvue Oasys. These lenses have an improved surface treatment, which leads to improved hydration and increased comfort.

More recently daily disposable soft hydrogel contact lenses have become increasingly popular. These lenses, such as J&J 1-day Acuvue Moist and CibaVision Focus Dailies have the advantage of being more hydrophilic and retaining moisture during the day.

Focus Dailies contact lenses contain AquaRelease to improve hydration and are replaced daily, leading to increased comfort from a cleaner lens. Daily replacement lenses also have the advantage of lower complication rates due to the lenses developing less surface deposits and lower infection rates. Obviously a contact lens case is superfluous with this mode of lens wear. Contact lens cases have been found to be a major source of microbes that can cause eye infections.

Contact lenses are now also available to buy online, meaning a faster, cheaper and more convenient alternative in purchasing your lenses. Contact lens wearers should still maintain a responsible attitude to lens wear, and have their eyes checked regularly by their eyecare practitioner. They should also check their own eyes daily for eye infections, by following the "Look OK, See OK, Feel OK" regime. Each morning after inserting the lenses they should check each eye look white, then check the vision in each eye separately, and then blink once or twice and ensure there is no discomfort. If there is any change, they should remove the lenses immediately and consult their eye care practitioner.

About the Author

Bruce Macnaughton is a freelance author who writes about
online contact lenses
and recommends Webcontacts.com.au.

Why do you have to replace your Contacts Lens case every 3 monthes?

Because i can't afford to spend $5.00 every 3 monthes on a new case.
What if i don't replace it?

I think it's just for hygeine purposes. I don't replace mine every three months and my contacts are just fine. I wash my case every night and it looks really clean. Talk to your eye doctor if you are still not sure.

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