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5 Common Diagnostic Tests for Glaucoma

Glaucoma

Dr JKS Parihar
Dr JKS Parihar
6 min read

Getting regular eye treatments can save you from chronic diseases. Some diseases are inherited and their symptoms do not show up in the early stages. Glaucoma is one of them. For those of you who are unaware of what is Glaucoma? It is an eye disease caused by increased eye pressure that can lead to loss of vision. Given the fact that there are no early signs and also, it has a painless nature, the problem is often termed as “Silent Thief of Vision”. The only approach to detect and prevent glaucoma is by getting regular eye examination or by specific diagnostic tests.

The 5 tests that are required to detect glaucoma are:

 1. Tonometry for Eye Pressure Measurement

The test is highly accurate in detecting glaucoma and it is executed with a tool called tonometer. In this procedure, the doctor uses a pencil-shaped device that contacts the surface of the eye. It doesn’t hurt as eyes are numbed with eye drops. The test takes a few seconds but it demands you to be patient. It is advised to sit relaxed and keep breathing normally during the measurement. Another way of testing is by using an instrument that will blow a puff of air in your eye to check the pressure inside your eyeballs. The test is safe and there are negligible chances that your cornea gets scratched when the instrument touches your eye. Even if it does, it heals itself after a few days.

2. Ophthalmoscopy for Optic Nerve Damage

To start with, your doctor uses eye drops to dilate your pupil. The test requires a medical device with a light and a special magnifying lens to check for any optical damage. The color, shape, depth, and size of the optic nerve determine the overall health of the optic nerve. Some doctors take the 3D view of the optic nerve for better assessment and determination of the status of glaucoma. The test takes around 5-10 minutes and it can give temporary discomfort to you. The eye drops may have a stinging sensation and it may keep your eyes dilated for a few hours. Your vision might get hazy after the test, in fact, in some cases, people may have nausea and dizziness too. You would require wearing sunglasses while going out and would not be allowed to drive for a temporary period.

3. Pachymetry For Cornea Thickness

The test is done with a small device called pachymeter, which measures the thickness of the cornea (it is the outer layer that covers the iris and the pupil). The thin cornea can put you at risk of getting glaucoma. This test helps in doing the correct diagnosis as the corneal thickness influences the eye pressure readings. Pachymetry takes only a minute to measure the eyes. The procedure is simple and painless and since you are given eye drops, it gets easier to perform.

4. Perimetry For Peripheral Side Vision

As the name suggests, perimetry is used to map your entire field of vision. The visual field is the area you can see right in front of you without moving your eyes. Here, the doctor maps what you see at the periphery of your visual field. The test determines whether your eyes are prone to glaucoma. During the procedure, you will be asked to look straight at the screen and indicate the examiner when you see light passing through your peripheral vision. There may be instances where you might feel a delay in seeing the light as it moves but this can happen as it passes through your blind spot. All you should do is sit back, relax and be attentive during the test for accurate results. The test that measures the peripheral and central vision takes about 5-10 minutes for each eye and this activity is repeated several times to ensure the process.

5. Gonioscopy for Eye’s Drainage Angle

The test is performed using a handheld mirrored contact lens called geniolens which determines the angle between your cornea and iris. If the angle is too wide, then this is a sign of open-angle glaucoma or too narrow, then it is a case of closed-angle glaucoma. During the test, your eyes are numbed and the device is used to check the inside of an eye from all directions and the angle between the cornea and the iris. The procedure is simple and painless.

Even though the aforementioned tests help in detecting the disorder, glaucoma is still not considered fully curable. One can prevent the eye from significant vision loss with medicines, laser eye treatments, and surgery. So, it is essential to take the tests on a priority basis, discover and deal with the disorder to save oneself from complete vision loss. To treat glaucoma, the surgeon may choose to either lower the eye pressure through medicated eye drops or improve drainage of fluid in the eye or lower the amount of the fluid produced in the eye through surgery.

With a panel of 20+ glaucoma specialists, Centre for Sight is a destination for the treatment of glaucoma in Delhi and India. If you are on a lookout of a trusted eye care partner then go for CFS. Having a team of several experienced doctors, CFS has managed to create a rapport for itself among people. Go ahead today!