Contact lenses are an excellent choice for nearly anyone who needs vision correction and doesn't want to wear eyeglasses full time or undergo Lasik surgery.
Contact lens materials.
The first choice when considering contact lenses is which lens material will best satisfy your needs.
• Soft lenses
• Silicone hydrogel lenses
• Gas permeable lenses.
• Hybrid contact lenses
• PMMA lenses
Contact lens wearing time
There are two categories of contact lenses based on recommended wearing time:
• Daily wear contact lenses — These must be removed nightly before sleep.
• Extended wear contact lenses — These can be worn overnight (for a limited number of days).
When to replace your contact lenses
Soft lenses have these general classifications, based on how frequently they should be discarded:
• Daily disposable lenses — Discard after a single day of wear
• Disposable lenses — Discard every two weeks, or sooner
• Frequent replacement lenses — Discard monthly or quarterly
• Traditional (reusable) lenses — Discard every six months or longer
Contact lens designs
Soft contact lenses (both hydrogel and silicone hydrogel lenses) are available in a variety of designs, depending on their intended purpose:
• Spherical contact lenses
• Toric soft contact lenses
• Multifocal contact lenses
• Cosmetic contact lenses
More contact lens features:-
Bifocal contacts for astigmatism.
Contacts for dry eyes.
Colored lenses.
Special-effect lenses.
Prosthetic lenses.
Custom lenses.
UV-inhibiting lenses.
Scleral lenses.
Which contact lenses are right for you?
There are a number of factors that can influence which contact lenses are best for you:
1. The contact lenses 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 myopia hyperopia astigmatism or some combination of those vision problems.
2. The lenses must fit your eyes. To do that, lenses come in tens of thousands of combinations of diameter and curvature. Of course, not every lens brand will have the size you need.
3. You may have a special need that drives the choice of lens. For example, your eye doctor might recommend a particular type of contact lens if your eyes tend to be dry.
4. Consider your "wish list" of contact lens features — colors, for example, or overnight wear.
Consult your eye doctor to determine the best contact lens material and design for your specific needs.
Contact lens wear
Caring for your contact lenses — cleaning, disinfecting and storing them — is quite simple.
-Most people require only a single multipurpose solution to clean, disinfect and safely store their lenses.
-People who are sensitive to the preservatives in multipurpose solutions might need preservative-free systems, such as those containing hydrogen peroxide.
-Your eye doctor will recommend a lens care system. Be sure to follow the care directions carefully.
Contact lens problems
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 your eyes or lenses are uncomfortable or you are not seeing well, remove your lenses and consult your eye doctor immediately.
Article by
Dr. A H Hajra Salar
Ophthalmologist
I Care Center
Hyderabad
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