Contact Lenses
January 13, 2009
Since the invention of contact lenses, most people are opting for them instead of glasses. Many of us wear them to add charm to the face. But not everyone can wear them. It may be due to sensitive eye tissues which can not tolerate lenses, or it can be due to a medical condition that prevents their use. This involves people with allergies, or other problems like blood shot eyes or excessive watering eyes.
They also require lots more care than the glasses. And it takes time to get used to contacts also.
Contacts also cause several complications if not used properly. This includes corneal abrasions, swelling, infection, pain, redness and watering. Lenses which are damaged or unclean, poorly fitted or worn for too long cause the above complications.
When going for contact lenses, consult a qualified contact lens specialist to know about the type of contact that suits you the best. Go for a complete eye examination and measurement to acquire a well fitted lens. This is important as the lenses are in direct contact with the sensitive eye tissues and thus can damage them if improper.
There are two categories of lenses: Rigid lenses and soft lenses.
Rigid lenses: They cover only a portion of the cornea and acquire their shape when worn. There are two types of rigid lenses: hard and semi-hard.
Hard lenses: These lenses are more durable and last for 3 to 5 years. They also provide sharp vision. They are easy to maintain and less prone to infection. But they require a lot of time getting used to them. They get dislocated easily and cause the dust to get caught in between.
Semi-hard lenses: These are an improvement over the hard lens. They are easy to adjust and do not irritate the eye. But they require little more maintenance than the hard ones.
Soft lenses: They cover the entire cornea. They fit the eye and take its shape. They are available in reusable and disposable, daily and extended wear, and colored. These lenses are easy to adjust to, and can be worn for a longer period of time. But they require extra care. They deteriorate from the contact of smoke, vapor, or makeup. They also do not provide a very sharp vision.
Precautions while wearing the lenses:
Before touching the lens, remember to wash your hands and never touch them with the nails.
Remove them when going for a swim.
Apply makeup after wearing the lenses. Try to use water based eye make up and cleanser.
Cut the nail of the finger you use while putting the lenses on.
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