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Suit for  the patients who is with hyperopia: 

2011, the latest population statistics shows that the world´s population comes to the peak of 70 billion. Since 1987, the global population has increased rapidly; it grows 10 billion each 12 years. Aging as a normal populationphenomenon has come ahead. Aging is not terrible; the important is how we deal with a series of problems brought by aging. The most common health problem is presbyopia for aging; it has become a more and moreserious vision obstacle for the middle-aged.