Glaucoma is a group of diseases which cause visual loss by damaging the optic nerve.  The loss of sight initially starts from peripheral field of vision and as a result most of patients don't notice that in early stages. 

In most of patients, the pressure in the eye is higher than normal and it gradually damages the optic nerve. Some people with high pressure in the eye never get glaucoma and some patients who are suffering from glaucoma have normal pressure. This confirms that several factors contribute in causing glaucoma and in progression of the disease.

Normal View


For further information about glaucoma click the below image

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Treatment for Glaucoma


Drops are the most common form of treatment for Glaucoma, but sometimes tablets or intravenous medications may be needed to control the pressure in the eye.

Laser Peripheral Iridotomy

This a laser done for patients who are differing from angle closure glaucoma or at risk of that.

Selective Laser Trabeculoplasty

Selective Laser Trabeculoplasty (SLT) is done in patients with open angle glaucoma. There is increasing evidence supporting using SLT as an alternative to eye drops for initial treatment of glaucoma. It is also an option when the patient faces side effects of using drops or cannot use them.


A surgery may become necessary if conservative treatments like drops and laser fail to stop disease progression. This include incisional surgeries like Trabeculectomy and using shunt tubes. The aim in all of these surgeries is to safely open a pathway through the Wall of the eye to outside to drain the fluid from the eye.

Minimally Invasive Glaucoma Surgery (MIGS)

Minimally Invasive Glaucoma Surgeries are a group of surgeries which use micro implants to drain the fluid from the eye. They reduce the risk of having complications compared to traditional incisional surgeries and have shown promising results. 

iStent is one of the most common MIGS surgeries done in the world. It is usually implanted during cataract surgery and considering its very low risk of complications is a good option for patients suffering from glaucoma.

iStent Surgery by Dr Rahman Nazari Ophthalmologist