Definition of Presbyopia:
It is an impairment of near work due to advanced aging caused by a decrease in the accommodation power of the crystalline lens.
Causes of Presbyopia:
In advanced age, there is a decrease in the accommodation power of the lens due to the loss of elasticity of the crystalline lens it is not a refractive error but a physiological change in the elasticity of the lens.
Symptoms of Presbyopia:
- Difficulty in near work such as reading small prints and threading a needle etc.
- Asthenopic symptoms occur due to fatigue of ciliary muscles
It is treated by convex lens.
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