All You Need to Know About Specialty Contact Lenses
Contact lenses have become quite popular these days. They are a subtle way of rectifying your eye power by replacing conventional methods such as, eyeglasses. But, every contact lens comes with some issues. The cornea of the eye of each individual person is different and the standard contact lenses do not always carry out the job perfectly. They may not fit exactly in the eye or may keep slipping all of a sudden. Some eyes are even allergic to regular contact lenses. The sensitive eyes can also keep watering due to the usage of such lenses and can even lead to further allergic reactions. To get rid of all these problems, specialty contact lenses have come into the frame. These specialty contact lenses come with a unique ’fingerprint’ that is custom made and is tailored to fit individual eyes.
Who needs a Specialty Contact Lens?
Many people with eye problem may require these lenses. For instance, those people who do not have normal eyes and come under special cases that need a sharper vision or are suffering from dry eye syndrome, people who have scarring in the cornea or even those whose eyes that may need multifocal contact lenses require these specialty contact lenses. They are also, specifically, used to rectify disorders such as keratoconus, pellucid marginal degeneration, photophobia, cornea dislocation and other congenital problems, including physical or internal injuries and related diseases.
Sometimes, the effect of these specialty contact lenses is not rectification but aesthetics. They can make a defective or deformed eye look like a normal eye. The defects in the eye can be caused due to improper refractive surgery, change of power of eyesight, Ectasia (which is a form of corneal bulging), Aniridia, Strabismus or dry eye. It can also be effective for people who suffer from color blindness or other color vision deficiencies.
What are the Types of Specialty Contact Lenses?
Since they are used to treat and rectify different types of eye aliments, it is only fair that the specialty contact lenses also come in different types, size and shapes. Listed below are some of the most common types of specialty contact lenses. Your doctor can best advice you on the type of specialty contact lens that would best suit your eyes. Some of the types are:
- Rigid Lenses: They are made from stronger, durable material. They provide clear vision and are gas permeable. They are usually smaller than other lenses and cover only about three-fourth of the total area of cornea. New users may take a long time to adjust to these lenses and comfort only comes with practice.
- Soft Lenses: These lenses are made from materials like hydrogel and silicone hydrogels that are more flexible so that they adjust and fit to your eye, accordingly. They are breathable and allow oxygen through outer eye layer. If you want comfort or ease of use, then this is the best lens for you. But on the other side, it may not give a stable vision like the other lenses.
- Hybrid Lenses: To get the advantages and discard the negatives of both the soft and the rigid lenses, the hybrid lens was developed. The material base involves a mixture of both hard as well as soft material. The central region is more rigid, whereas the outer one is much softer. They have the combined advantage of both clear vision and comfort.
- Scleral Lenses: These are similar to the rigid lenses but are usually of a larger diameter. They are mainly used in the rectification of cornea irregularities and defects. These lenses are called sclera, because they rest on the sclera part of the eye rather than the cornea.