Evaluation of reading glasses

Posted by sean - December 20th, 2009

Reading glasses are needed for those who can not view close materials clearly. With naked eyes, these people have to hold books or newspapers an arm’s length, in which distance these materials can be clear. There are still some people squinting to read something in the distance. For these individuals, eye checkup is necessary.

Some people are new to reading glasses that an eye exam will give them an exact prescription of reading glasses. For those using glasses already, a higher prescription is needed. Whether in which condition, it is needless to worry about additional loss caused by wearing reading glasses. Choosing a proper pair, both charm and personality will not be affected.

Non-prescription reading glasses come in two basic categories: half glasses and full glasses. Full reading glasses offer vision correction at the entire lens thus clear vision can be ensured all the time. The shortcoming of this type of reading glasses is that distance vision can be blurred or even distorted. In order to get clear distance vision, the wearer must take off full reading glasses, which is quite inconvenient.

Half reading glasses are designed to offset this problem. This type only offers vision correction at the lower half of a lens, which is used to read near materials. The upper half of a half reading lens has no prescription, so that the distance vision will not be interfered. This advantage of half reading glasses eliminates the wearers’ needs to constantly remove their glasses. But it is also obvious that half reading glasses offer a smaller space of vision correction.

There are custom-made and ready-made reading glasses on the market. Always provided on a mass basis, ready-made reading glasses are much cheaper than customized ones. But defects are quite common in ready-made reading glasses. Bubbles and waviness can cause distorted vision. Some other defects may force the wearer to get tired more easily.

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Cause and surgery for drooping eye

Posted by sean - November 4th, 2009

As people age, their eyelids are always drooping, which is defined as ptosis. Although ptosis occurs in both adults and children, the old account for a major portion. The fact is that if a person compares a recent photo of his or her face with one from 10 or 20 years ago, he or she may realize obvious drooping eyelid that has developed over these years.

Ptosis is barely noticeable on most old individuals caused by aging, injury or side effects from a cataract surgery. And the drooping upper eyelid may cover a major part of the eye so that normal vision will be affected. Severe lid droops require people to tilt their heads back to see under the lid or raise their eyebrows to lift eyelids.

Muscles that are responsible for lifting the eyelid are called levators. Abnormal facial anatomy may be unable to control these levator muscles and droopy eyelid is caused. As a result, the best solution to ptosis is a surgery that tightens levator muscles to lift eyelids. For severe droopy eyelid, another procedure can be conducted to attach your eyelid to the eyebrow so that the forehead muscles will substitute for levator muscles in lifting the eyelid. Your eyelids may be asymmetric and higher after a surgery. The selection of surgeon is important, since improper surgery may lead to disappointing eyelid appearance or undesirable dry eyes.

There is also congenital ptosis. Children born with ptosis should visit ECP every year since their eyes are changing. They need early treatment for normal vision development. Untreated ptosis on children may lead to amblyopia or lifelong poor vision.

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