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| 1. |
What is presbyopia ? State its cause. How is it corrected ? (b) Why does the Sun appear reddish early in the morning ? Explain with the help of a labelled diagram. |
| Answer» PIA is an age-related condition that causes blurred near VISION. It typically starts at around age 40 and affects everyone, even those who've NEVER had vision PROBLEMS before.For centuries presbyopia was corrected with the use of bifocal eyeglasses. Today there are MANY ways to correct presbyopia with eyeglasses, contact lensesand surgery. | |