Glaucoma Screening Investigations

Glaucoma Screening Investigations

Glaucoma is one of the most common yet horrific eye diseases to exist in humans. It is a condition where the pressure of the fluid inside the eyes increases from its normal levels causing damage to the optical nerves due to strain. If left untreated, glaucoma causes vision loss and – in severe cases – permanent blindness.

Although anyone can suffer from Glaucoma, there are some factors that can put individuals at greater risk. These factors include:

  • Being of age (40 years old and onwards)
  • Having an African American background
  • Having an east Asian background

Having a history of glaucoma in the family

In order to protect from the drastic consequences of glaucoma, ophthalmologists (eye specialists) recommend extensive screening investigations according to the risk factors one presents. As a general rule of thumb, they advise an investigation:

  • Every 2-3 years for people aged between 40 to 54
  • Every 1-2 years for people aged between 55 to 64
  • Every 10-12 months for people aged 65 and above

The glaucoma screening investigations include various tests that may collectively allow ophthalmologists to diagnose glaucoma in its initial stages and potentially save a patient from the horrors of blindness. Below listed are some of the tests that are included in the investigation.


It is a test to measure the fluid pressure that is inside the eye. There are various methods of carrying this test. The most accurate one of them goes like this:

  • Applying eye drops to a numb eye
  • A thin paper stripe with orange dye is applied to the eye to help with the test
  • The patient rests face on a support
  • Tonometer is brought in contact with the cornea of the open eyes
  • The medical professional uses a slit-lamp and obtains a pressure reading

Dilation of pupil

It is a test where a certain type of drops is applied to the eyes which widen the pupil. The doctor examines the pupil dynamics.


It is a test where an ultrasonic wave instrument is used to measure the thickness of the cornea which helps in evaluating the eye pressure.

Optical Field Test

It is a test where the total area seen by the patient is obtained. The patient is made to look into a screen and a spot of a dim light glows at different spots. The patient presses a button when every time they detect the light.

Optical Acuity Test

It is a standard test to measure eyesight from different distances. The patient is made to look at a screen/chart a certain distance away. This chart has letters/numbers of different sizes and the patient reads them out with and without a different testing lens.

Optical Nerve Imaging

In this, the eye nerves are picturized and compared to obtain their behavior. Depending upon the patient’s glaucoma, one of the following techniques are used to obtain the image:

  • Stereo optic nerve photographs
  • Confocal scanning laser ophthalmoscopy
  • Optical coherence tomography
  • Scanning laser polarimetry


It is a test where the back part of the eye (fundus) is examined via a special instrument. This test helps the specified professional detect the exact damage to the optical nerve(s) of the eye due to glaucoma.


It is a test where uses the front part of the eye (anterior chamber) is examined via a special instrument. This test helps the specified professional to determine if the iris is closer than normal to the back of the cornea. This test can help in diagnosing and detecting closed-angle glaucoma.

Schedule an Appointment:

If you’re struggling with eye issues or sight problems, we recommend you get yourself checked by a trusted Ophthalmologist. At American Hospital Dubai, we have Eyes Specialists who boast a wealth of experience and expertise in diagnosing and treating a full spectrum of optical issues. Book an appointment with an eye care specialist by using our online form today!

Patient Experience

Patients Share their Review