Posts Tagged ‘Cataract surgery’

Knowledge of cataract

December 23rd, 2009

A cataract is a clouding of the eye’s lens, which is behind the iris and the pupil. Cataracts affect vision of more than half of the old over 80. A cataract may happen to either or both eyes. But it is not contagious. Three types of cataracts are commonly recognized: subcapsular cataract, nuclear cataract and corticl cataract.

There are many clear symptoms of a cataract, such as cloudy and blurry vision, fading colors, poor night vision, glare and double vision or multiple images in one eye. Patients show these symptoms more or less according to the size of the cataracts.

The lens is a part of the eye that is responsible for focusing light onto the retina and adjusting focus. Nerve signals are formed once light reaches the retina and then sent to the brain. As people age, some of the proteins clump together and cloud a part of the lens, then a cataract is formed. Over the time, cataracts may grow larger and cover more of the lens, making the vision worse. So cataracts are always related to aging. But according to many studies, ultraviolet light and cosmic radiation are associated with cataract development. People with diabetes are more probably to suffer from cataracts. Bad habits such as cigarette smoking and heavy alcohol consumption may also cause a cataract.

How to treat cataracts? At the early stage of a cataract, glasses, strong bifocals and magnifier may be enough. But when the cataract has progressed enough that seriously impairs the vision, Cataract surgery is needed. Cataract surgery is simple and safe and will effectively restore your good vision.

Cataract surgery procedure

October 21st, 2009

Cataract surgery is the procedure of removing the cloudy lens of the eye. Cataract surgery replaces the natural lens with a synthetic lens to restore the lens’s transparency thus the normal vision is back. A synthetic lens of cataract surgery is more widely known as a permanent intraocular lens (IOL) implant. There are three types of Cataract surgery: Phacoemulsification (Phaco), conventional extracapsular cataract extraction (ECCE) and intracapsular cataract extraction (ICCE). The first kind of cataract surgery is performed in most cases.

Certain preparations should be made before a cataract surgery. Firstly, ophthalmologist should make sure that there are no associated pathologies, which may cause interference. The power of the IOL to be implanted should match the length of the eye and cornel curvature. So a prior measurement must be made before the cataract surgery.

During the cataract surgery process, the patient will be given eye drops to dilate the pupil and a sedative for relaxation. The doctor will cleanse the skin of your eye. Under a microscope, a small incision is made into the eye. The whole cataract surgery process consists of many steps: anaesthesia, eyeball exposure, eye entry, hydrodissection pie, IOL implantation, viscoelastic removal and wood sealing etc…

After the cataract surgery, a protective shield will be put over the eye. The cataract surgery may cause mild discomfort so that subsequent care should be taken. During the following few weeks after a cataract surgery, you should take eye drops prescribed by the surgeon several times everyday. Sunglasses are needed for protection from bright light.

Cataract surgery is safe and can achieve almost perfect outcomes. Less than 2% of the cataract surgery takers may have sight-threatening complications.