Showing posts with label contact lenses. Show all posts
Showing posts with label contact lenses. Show all posts

Monday, July 6, 2015

How Safe Are Contact Lenses?



About three million people in the UK wear contact lenses. It is getting more popular day by day for various reasons. Some contact lenses content UV blocking agent that cover your cornea. But another study says that, a million people visit doctors every year for eye infections from the lenses. Most of the infections occur because people ignore their doctor’s advice. About 45% people don’t wash their hands before use their lenses. So this problem is not only with the contact lenses, but also with the people who use it. There are a number of steps that improve the safety. These are very much easy and straight forward but many people ignore it and fall into diseases. Consider your eyes are more precious than anything. 


Contact Lenses may be various types:


Reusable contact lenses – which can be reused, rather wear once and throw away. It must be clean before use again.

Disposable lenses – it is used once and unsuitable for repeated used. It doesn’t need cleaning or disinfecting.

Extended-wear lenses – they are specially designed for wearing over night. You may check up your eyes frequently if you use this type of lens.

No matter what types of lenses you use you must clean your hand and disinfect the lens with an appropriate solution before using it. Reusable contact lenses need special care before and after using as it  prevents harmful organisms building upon it. Don’t use disposable lenses more than once because they are designed to use only once, otherwise it will cause harm to your eyes.

A recent study shows that, disposable lenses are used more than they should be used and also one and half time longer than recommended. Soft contact lenses are packaged in a small container which is filled with fluid. This fluid may be contaminated if it stayed for a long time. So before use, wash and rinse it with new solution.

Now a very popular new trend that is to use contact lenses in Halloween and other festivals. With a vampire costume people use lenses like veined and bloody eye, swirling eyes, red or green eyes, make a shape of cats pupil or kaleidoscope eye, etc. In these cases people use them without a valid prescription and without consulting a doctor. Most of these lenses are collected from local street vendors, from fashion boutiques and beauty supply stores with a little amount of money. So they are risky and un-hygienic. Fashion contact lenses are different in size to fit your eyes. If this does not fit eyes properly, then serious eye damage like corneal infection, decreased vision, conjunctivitis, and scratches on the cornea and in some cases blindness may occur. So avoid these cheap lenses. Consult with your doctor, he will give you a valid prescription with brand name, lens size, and expire date.

 

Some easy way to safety use of your lenses:


1.  Wash hand with clean water. Take the lens in your palm. Gently clean with the new solution.
2.  Place the lens on the top of middle finger. Gently place it to eye and blink to settle it.
3.  Don’t use water or other liquid to wash face while wearing lenses.
4.  After using again clean it with appropriate solutions and put into the case with new solution. Be sure that the lenses are completely inside the liquid.

For anybody who is wearing contact lenses, be sure that you are having regular checkups with your optician to ensure all looks good. Contact lenses are safe to use, but only if anyone follows the doctor’s guidance and the straightforward rules of care.




Sunday, May 10, 2015

A Brief Story of Contact Lens



Market of contact lens is spreading day by day. It has become popular with the teenagers and young people. People use different types of contact lenses for so many reasons. But the history of contact lens is very old. Leonardo DA Vinci, the greatest Italian painter, sculptor, inventor came up with the idea of contact lens. He did not implement the idea and did not think about contact lenses to be used to correct the vision. Yet, his idea inspired other persons named Thomas Young, Sir John Herschel etc. to implement it later.



At last, in 1888 Adolf Fick, successfully fit contact lenses. Initially, he fitted contact lenses in rabbits experimentally and later himself. Heavy Blown glass had been used to make those lenses. Later, in 1960 with the help of improved manufacturing technology a lens named PMMA became the first corneal lens which got more mass appeal. But the most disadvantages of this lens were oxygen can not transmit through this lens. It can cause serious clinical effects. In 1965, National Patent Development Corporation introduced rights to produce lenses and gave sublicensed to Bausch Lomb to manufacture lenses in the United States.
Depending on the material, primary function and wearing schedule Lenses can be classified in so many categories. Let’s have a look on the below categories.


Corrective Contact Lenses


To correct and improve the vision these can be used. Myopia, Hypermetropia, Astigmatism can be corrected by this lens. To get the clear vision with the accurate power with this lens, the lens directly focuses the light so that it enters the eye.


Multifocal Contact Lenses


These lenses have multiple focal points and generally developed for constant viewing within the center of the lens.


Monovision



This kind of lenses has only one focal point per lens. Usually, this single vision lens used to focus one eye for distance vision which is the person’s dominant eye and another eye for near vision so that the person’s brain can be used to the setup to see very much clearly from all distances.
There are some other types of lenses also in the market. color contact lenses is one of them which got much popularity to change someone’s eye appearance. Also, refractive error can be cured by cosmetic lens. But this lens is not advisable to use as different types of irritations, infections can be occurred by this lens.
A newly invented lens named circle contact lens become a new craze in Japan, China and South Korea. Circle lenses extended the looks of the iris directly on the sclera by possessing a dark tinted area surrounding the iris. The outcome is, the outside appearance associated with a bigger, wider iris.


Generally, colored contacts are safe as long as it is being used as per rules and regulations. Incorrect use of contact lenses can potentially affect eyelid, cornea and the conjunctiva. Due to inaccurate wearing schedule many complications can arise. After a designated time schedule contact lenses muct be changed. Also, mishandling of contact lenses increase the chance of infection. Wash hands before touching the contact lens with soap and dry hands with tissue or towel. So, special care should be taken to the contact lenses.
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