The most common complication of adults having standard extracapsular surgery or phacoemulsification for cataracts is clouding of the part of the lens covering (capsule) that remains after surgery, called posterior capsule opacification. If the cloudiness affects your vision, you may choose to have a laser treatment called Nd:YAG posterior capsulotomy to correct this problem.
A laser (Nd:YAG laser) is used to cut a hole in the clouded back lining of the lens capsule to allow light to pass through the membrane to the retina at the back of the eye.
Nd:YAG laser posterior capsulotomy is an outpatient procedure. It does not require anesthesia, and it is painless. The person may wait in the outpatient surgery area or the doctor's office after the procedure so that he or she can have the pressure in the eye (intraocular pressure) checked. Intraocular pressure (IOP) is the pressure caused by the fluid inside the eye that helps keep the shape of the eye.
After cataract surgery, some people notice cloudiness (sometimes called aftercataract) after several months or years. In some people, it can become very dense and cause as much or more vision loss as the original cataract. The decision to have this procedure is based on
Nd:YAG laser posterior capsulotomy reduces glare and improves vision. It lets light pass through cloudy regions of the lens capsule that may develop after cataract surgery.
The most common complication of Nd:YAG laser posterior capsulotomy is short-term increased pressure inside the eye.
It is common to have a new floater in the eye after this Laser.
Photocoagulation uses light to coagulate tissue. When energy from a strong light source is absorbed by tissue and is converted into thermal energy, coagulation necrosis occurs with denaturation of cellular proteins as temperature rises above 65 degrees C.
Since the Diabetic Retinopathy Study, technology evolved from using a diffuse Xenon arc to using well-focused laser in photocoagulating retinal tissue in high risk proliferative diabetic retinopathy. Presently, laser retinal photocoagulation is a therapeutic option in several retinal and eye conditions.
Effective retinal photocoagulation depends on how well light penetrates the ocular media on its way to the retinal tissue and how well the light is absorbed by pigment in the target tissue. In retinal tissue, light is absorbed by melanin, xanthophyll or hemoglobin. Melanin absorbs green, yellow, red and infrared wavelengths; xanthophyll (in the macula) absorbs blue but minimally absorbs yellow or red wavelengths; hemoglobin absorbs blue, green and yellow with minimal red wavelength absorption.
Indications for retinal photocoagulation include the following:
Pan-Retinal Photocoagulation (PRP) is a form of treatment used for proliferative retinopathy including diabetic retinopathy and vascular occlusion retinopathy. Proliferative diabetic retinopathy is characterized by a growth of abnormal blood vessels within the retina as a result of ischemia (lack of oxygen). These abnormal blood vessels can leak profusely, causing serious damage to the retina and hemorrhaging into the vitreous.
Pan-Retinal Photocoagulation treatment uses a laser to destroy small areas of the peripheral retina. As shown in the picture above, several hundred spots will be placed in a circle around the mid-periphery of the retina. This reduces the over-all oxygen demanded by the retina, allowing oxygen to be better utilized by the area of the retina responsible for central vision. The treatment also prevents the growth of abnormal blood vessels within the retina. Multiple studies have shown PRP to be very effective in treating proliferative diabetic retinopathy and stabilizing or improving vision. Studies have also shown that over 50% of proliferative diabetic retinopathy cases left untreated lead to blindness, where as only 5% of treated cases lead to blindness.
The problems after laser treatment are very small. If you have pain in the eye, take ibuprofen or acetaminophen. Should you experience an increase in flashes or floaters, or the sensation of a black curtain coming across your vision please call you doctor immediately. Likewise if you experience significant pain, redness, or a large drop in vision contact your doctor immediately.
No. You can return to your normal activities the same day as your laser treatment and do not need to take any prescription eye drops afterward. You can shower and watch TV without any harm to your eye.
Diode CycloPhotocoagulation or DCP, is an exciting development in the management of glaucoma.It is performed on an outpatient basis. In this procedure, the ciliary body of the eye, which creates fluid, is treated with a laser. This reduces fluid production that in turn, reduces intra-ocular pressure. The ciliary body is a small gland running around the circumference of the eye located behind the iris.
It can also be performed on those patients who had SLT or ALT laser procedures, glaucoma filtration surgery or other surgical procedures that were not successful at controlling intra-ocular pressure.
DCP has proven to be an effective way to reduce intra-ocular pressure. Studies have shown that the majority of patients have their glaucoma medications reduced or completely eliminated after the procedure and are no longer at risk of loss of vision from glaucoma.
The effect of the surgery may wear off over time, but the majority of patients have their pressure reduced and many can eliminate their need for glaucoma medications