Presbyopia is denned by the progressive loss ot accommodation and subsequently reduced ability to achieve a near focus when distance corrected. This progressive change, despite beginning in childhood, is almost universally clinically relevant after the fifth decade, being responsible for a significant decrease in quality of life.1 The number of people affected by presbyopia is growing fast due to aging of the population.The mechanism of accommodation is very complex, and the adequate understanding of how it actually works is the first step toward the development of an effective procedure to reverse it. The most widely accepted theory was proposed by Helmholtz2 and confirmed by more recent studies in primates.
展开▼
