In video lecture, Sir told us that presbyopia is a defect in the eye in which a person can not see near objects clearly, and It can be corrected by convex lens but My Teacher told me that presbyopia is a defect in eye in which a person cannot see both, near and distant objects clearly and It is corrected by bi focal lens, So who is correct?
THE FACT THAT IS TOLD BY YOUR SCHOOL TEACHER ABOUT PRESBYOPIA IS CORRECT FOR OLD AGE PRESBYOPIA ,IN WHICH A PERSON SUFFERS FROM BOTH MYOPIA AND HYPERMETROPIA .AND WE HAVE TO USE BIFOCAL LENS TO CORRECT THIS EYE DEFECT WHOSE UPPER SIDE IS CONCAVE AND LOWER SIDE IS CONVEX.HOPE THIS ANSWER WILL HELP YOU!!
Presbyopia which literally means “aging eye” is an age-related eye condition that makes it more difficult to see up close. Presbyopia is a symptom caused by the natural course of aging, Presbyopia differs from myopia (nearsightedness), hyperopia (farsightedness) and astigmatism, which are related to the shape of the eyeball and are caused by genetic and environmental factors. Unlike these commonly known eye disorders, presbyopia is simply a symptom of aging and eventually affects every individual.