Cataract Surgery, including lens implantation
Corneal Surgery
In normal vision the light enters the eye through the lense and is focussed on retina.
In cataract the lense becomes cloudy preventing the light from being focussed properly. This causes the images to be blurred and yellowed. Vision is hazy and colors are faded.
Phaco is the latest type of cataract surgery. A small incision is made near the cornea. This Procedure requires specialized surgical training .An ultrasonic needle (producing sound waves) is inserted into the lense. Sound waves are sent through this needle to break the lense. The broken lense is sucked out through the needle. Now an artificial lense has to be inserted. The cataract lense is removed and an artificial lense is inserted. The intraocular lense is folded and passed through the tiny incision and opened inside. A stitch is sometimes used to close the opening.
Surgery is usually done to restore full sight to individuals suffering from cataract. The Operation has very few risks. Recovery period is short and improvement in sight is remarkable.
Lasik Treatment :
A liquid anasthetic is dropped into the patient's eye, numbing it for surgery. The physician then gently props the eye lids and marks the cornea with water soluble ink to guide the later reposioning of the flap. A suction ring holds the eye steady while the mikrokeratome , a cutting instrument , is put in place. Pressure is applied to the eye so that it is firm enough to be cut cleanly. This also dims vision.After the cornea is moistened the mikrokeratome glides across its surface, cutting through the other layers. The instrument stops automatically, living an uncut section to act as a hinge. After the suction is turned off and the cutting device removed , vision returns. The surgeon carefully lifts the still attached corneal flap out of the way, exposing the underlying layers that must be excised by the laser.
Short Sight ( Myopia ) : Nearsighedness or myopia , occurs when light entering the eye focuses in front of the retina instead of directly focusing on it. This is caused by a cornea that is steeper, or an eye that is longer, than a normal eye.
Long Sight (Hyperopia) : Hyperopia occurs when the light entering the eye focuses behind the retina instead of directly focussing on it. This is caused by a cornea, that is flatter, or an eye that is shorter, than a normal eye.