Contact Lenses | Benefits | Uses | What is It?

Contact Lenses

Contact lenses are closer to natural sight than eyeglasses. They move with your eye and correct the refractive error closer to the eye to allow for a more natural field of vision. They don't get in the way of your line of sight, like glasses can. Contact lenses can be worn all day, or even several weeks at a time, so you don't have to worry about putting them on and taking them off.

What is the Principal Behind Contact Lenses

The principles of refraction and related to optics are similarly applied to contact lenses. This contains the correction of current defect by replacing the contact lens surface with corneal curvature which accured in accordance with the degree of myopia and hypermetropia. Since the major part of astigmatic defects develop due to the distortion of frontal layer of cornea, either hard or special soft lenses produced only for astigmatism shall be used. 

Cases In which Contact Lenses are Used

Farsightedness / Hyperopia: -  People with hyperopia can see clearly far away, but their close-up vision is blurry. To correct hyperopia, the lens is thicker at the center and thinner at the edges. These lenses are called plus, or convex. The lens bends the light toward the center and moves the focal point back so that light is focused on, rather than behind, the retina.

2 Types of Contact Lenses

• The Gas permeable hard lenses
• Soft Lenses   

Contact lenses are not one-size-fits-all, and constant "lens awareness" could indicate a poorly fitting lens. Lenses come in thousands of combinations of diameter and curvature. If your lenses have the wrong diameter or curve, you'll likely feel that something is always in your eye. If the lenses are too large, your eyelids will tend to dislodge them when you blink. The wrong size lenses can even cause abrasion of your cornea.

Wearing contact lenses should be a comfortable alternative to wearing regular glasses to aid in improving vision.  Yet sometimes people don't receive the desired benefits of wearing contact lenses.  So Make sure you are not getting any problem after wearing Contact lenses.