|
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.
|
