Contact Lens Basics

Presbyopia And Contact Lenses

Presbyopia is a normal loss of ability to focus on the nearer objects as one ages. Most people experience presbyopia after the age of 40 and later. As one becomes old, the crystalline lens inside the eye becomes thick and less flexible resulting in the condition called presbyopia. The crystalline lens remains relaxed while viewing distant objects but in case of nearer objects the lens changes shape to add focusing power to the eye which is called accommodation. Therefore, the crystalline lens becomes thick as one grows older thus resulting in insufficiency of lens power for bringing near objects in to clear vision.

The symptoms of presbyopia are similar to farsightedness. Some of them are:

A) Headache, eyestrain or fatigue when performing close work.
B) Blurred vision at a normal reading distance.
C) Facing difficulty in changing your focus from distance to near
D) Holding your reading material at arm's length to see clearly

Presbyopia can be corrected with eyeglasses and contact lenses. Many contact lens wearers have their prescription adjusted for monovision to correct presbyopia. For this your doctor may modify your contact lens prescription so that one eye remains mildly near sighted. Successful monovision enables one eye to see distant objects clearly and the other to see near objects clearly. This allows clear and comfortable vision at all distances. About 75 percent of people are very impressed with the monovision.

Presbyopia can also be corrected by using bifocal lenses. But, these are expensive than the lenses used for monovision. Sometimes your doctor may recommend a bifocal lens on one eye and a standard contact lens on the other for obtaining best results. This technique is known as modified monovision. Presbyopia can also be corrected by refractive surgery.

It is also detected by an eye exam taken by your optometrist who would suggest the type of lenses to provide you a clear and comfortable vision. Presbyopia is a normal aging change in the eye which is experienced by everyone in their 40s or 50s. The nightmare is that it can not be prevented.