40 years later, eyeball subjects contractile crystalline sclerosis, wholesale ray ban lead to adjust ability is abate, focus gradually sink down. When reading the book only move farther some, lighting to light some to see. These symptoms and increase with age, this is the old depending, commonly known as aging or LaoGuang.

Old depending on the is a natural physical aging, everyone from forty years old up can produce this kind of phenomenon. Due to the crystalline form gradually sclerosis, elastic gradually reduce, lost its softness, not enough to summon up, resulting in a regulation is insufficient, this difficulty depends on close. Aging is each person can't avoid weakened the physical adjustment process, and with the increase of age level gradually.

LaoShiYan happened often should be early objectives such as books and periodicals move far below in bright light can see or. Later, target is farther also cannot see, if barely read or do close quarters work will appear eye trapped, fake ray bans eye pain, illegible or even have a headache wait for visual fatigue symptoms.

Wear appropriate reading glasses (convex) to compensate for DiaoJieLi shortage. To face up to the eye of the usual first (40) wearing 1 D convex mirror ball can be (but should again according to the individual practical work need to the appropriate adjustment degree), every increase year after more 0.1 D after age 60 to slow down the increase, the highest do not exceed 3.5 D.

Have the patient of correct refractive error, should be used to correct refractive error correction based on the lens degree, cheap ray bans then press the age and everyone actual needs to give should wear old depending on the lens. So, glasses must understand each patient before the close working distance, two eyes refractive status and DiaoJieLi (adjust breadth).