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What is Contact Lens? Who Can Use?
Contact lenses are optical devices worn on the eye to treat vision problems.
Astigmatism, myopia, and hyperopia are among the refractive errors that it is used to correct. Vision deteriorates and is not sufficiently improved by glasses in keratoconus, an eye disease.
Gas-permeable rigid lenses, piggy-back lenses, or hybrid lenses can help these patients see better. To change the color of the eyes, cosmetic lenses have been created.
Sportspeople, especially those who wear highly prescribed glasses, can greatly benefit from contact lenses because they offer a wider field of vision and normal-sized vision of objects.
What Factors Should We Bear in Mind When Purchasing Contact Lenses?
Since contact lenses are applied directly to the eye, they should only be applied under the supervision of an ophthalmologist after having the eye's suitability for lens wear determined. The eye and the contact lens must be compatible.
Due to malnutrition, lenses that don't move around enough on the eye can lead to eye erosions and redness. On the other hand, individuals who wear lenses that move excessively on the eye experience stinging and redness as a result of tissue irritation.
Important variables influencing lens use include lack of tears, allergies, and work environment.
How Should Lens Inspection Be Done?
The individual's eyeglasses examination should be repeated before prescribing contact lenses. One factor lowering lens satisfaction is a change in the number of glasses.
The person is given the trial lens in the number that is closest to their eyeglass number, which is then kept on their eye for a while. The lens's fit is then evaluated.
The contact lens is ordered if the fit is satisfactory by once more locating the number on the lens. Buying contacts without first getting them examined and looking at your eyeglass prescription can have serious consequences, including eye loss.
What Kinds of Contact Lenses Are There?
Various contact lenses are produced based on demand. Who may wear which type of contact lenses should be determined by the doctor.
LENSES TO BE USED FOR ONE MONTH
These lenses need to be taken out for at least 8 hours every night, but they need to be thrown away after a month. Although there are some lenses that can be worn for up to a month, it is advised to take them out once a week. Using monthly disposable contact lenses that are taken out at night is healthier for people who lead normal lives.
LENSES TO BE USED FOR ONE YEAR
These lenses must be taken out for at least 8 hours every night and are thrown away after a year.
LENSES FOR GAS-PERMEABLE RIGID CONTACT
It is applied to people with severe astigmatism as well as diseases like keratoconus where the cornea is distorted.
SMOOTH LENS
It is better suited for people who do sports, work in dusty environments, and have astigmatism below a certain degree.
FLEXIBLE TORIC LENSES
For those with astigmatism of 0.75 or more, it improves vision.
BIFOCAL CAMERA
They serve as lenses that let us see both up close and far away. It is advised for those who lead active professional lives or for those who use distance lenses and require close-up eyewear.
PIGGY-BACK LENSES
It involves combining the use of gas permeable hard lenses with soft lenses. It is used by those who require gas permeable hard lenses but are unable to use them for a variety of reasons.
DUAL LENSES
They are lenses made of a soft material all around and are gas permeable in the center. used in a similar way to piggyback lenses.
CONTRAST LENSES
They are contact lenses that alter the color of the eyes.
CONSTRUCTIONAL LENSES
When the cornea is white from a prior disease, it is used for aesthetic reasons.
PHOTOGRAPHIC LENSES
When used on people who are color blind, it makes sure that colors are perceived as closely to reality as possible.
