PRESBYOPIA IN ELDER

Abstract

This article has been published to provide readers knowledge and understanding in presbyopia including symptoms and treatments. When we are focusing on the distant object, the eye will have no accommodation. But when we need to focus on the object nearby, ciliary muscles will contract which cause the lens more curve in order to have clearer vision on close object. Accommodation mechanism can work in both automatically and normally since we were born until the age of 40. After the age of 40, our accommodation mechanism will be weaker. When we are children, we can clearly accommodate the object nearby, but people accommodation mechanisms tend to decrease overtime until their age reach 40 which the ciliary muscles’performance are insufficient for focusing on the text of the book located at 30 centimeters. In order to read, these people should move the book to more distant or using the convex lens (plus power lens) to compensate weak accommodation. Accommodation power will gradually decrease until zero which is the normal condition of human. This will happen around 40 years old. Somebody has presbyopia with little symptom such as difficulty with reading close work but in some cases have eye ache, headache or eye irritation. Patients should be examined to get diagnosis and treatment compatible to their jobs, lifestyles, and personalities.