What is Presbyopia?

Posted on April 1st, 2009 by admin

 
Presbyopia, also known as the ageing eye is a term used to describe an eye in which the natural lens can no longer accommodate (adjust itself). Accommodation is the ocular ability of changing its focusing distance: the lens thickens, increasing its ability to focus close-up. At about the age of 40, the lens becomes less flexible and accommodation is gradually lost. It’s a normal process that everyone eventually experiences. 

 
Most people first notice difficulty reading very fine print in the phone book, on a medicine bottle, or on the stock market page. Print seems to have less contrast and the eyes become easily fatigued when reading a book or computer screen. Early on, holding reading material further away helps for many patients. But eventually, a reading correction in the form of reading glasses, bifocals, or contact lenses is needed for close work. However, short sighted people can remove their glasses to read close-up.
 

Signs and Symptoms
- Difficulty seeing clearly for close work
- Small print seems to have less contrast
- Brighter, more direct light is required for reading
- Reading material must be held further away
- Fatigue and eyestrain when reading

 

Detection and Diagnosis
Presbyopia is detected with vision testing and a refraction.

Treatment
The treatment for presbyopia is very simple, but is entirely dependent on the individuals age, lifestyle, occupation, and hobbies. If the patient has good distance vision and only has difficulty seeing up close, reading glasses are usually the easiest solution. For others, bifocals (glasses combining both reading and distance correction) or separate pairs of reading and distance glasses are necessary. Another option is monovision: adjusting one eye for distance vision, and the fellow eye for reading vision. This can be done with contact lenses, corrective treatment called Near Vision CK correction or even laser refractive surgery.

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