Tonometry
Dr Rajeev Raut Eye Clinic Raut Eye Care

Read the article to know more about Tonometry

Reviewed by
Dr. Aditya Raut M.B.B.S D.O.MS
Updated on Mar 08  •  2 mins read
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What is Tonometry

Tonometry is a medical test used to measure the pressure inside the eye (intraocular pressure).It is a simple, painless procedure that takes just a few minutes to complete.

During the test, the doctor will use a tonometer, a special device that measures the pressure inside the eye.The tonometer will gently touch the surface of the eye and measure the eye pressure.

The eye pressure measured during the test is used to diagnose and monitor certain eye conditions, such as glaucoma.The results of the test can help your doctor determine if treatment is necessary to lower the eye pressure.


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When to do Tonometry

  1. Tonometry is a procedure used to measure the pressure inside the eye. It is used as part of routine eye examinations for people of all ages and is also used to diagnose and monitor certain eye conditions.
  2. People who should get Tonometry done include those with glaucoma, those with diabetes, those with family history of glaucoma, those with a history of eye trauma, and those with a history of steroid use.
  3. If a patient experiences sudden, severe eye pain, blurred vision, rainbow halos around lights, or a sudden increase in pressure in the eye, they should consult a doctor urgently for Tonometry. Other symptoms that could indicate a need for Tonometry include loss of peripheral vision, redness of the eye, increased sensitivity to light, and eye pain that worsens with eye movement.

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Diseases in which Tonometry is done

  1. Glaucoma: Tonometry can help diagnose glaucoma by measuring the pressure inside the eye. The higher the pressure, the higher the risk of glaucoma.
  2. Cataracts: Tonometry can help diagnose cataracts by measuring the pressure inside the eye. An increase in intraocular pressure can indicate that a cataract is present.
  3. Macular Degeneration: Tonometry can help diagnose macular degeneration by measuring the pressure inside the eye. Increased pressure can indicate the presence of macular degeneration.
  4. Diabetic Retinopathy: Tonometry can help diagnose diabetic retinopathy by measuring the pressure inside the eye. High pressure can indicate the presence of diabetic retinopathy.
  5. Retinal Detachment: Tonometry can help diagnose retinal detachment by measuring the pressure inside the eye. If the pressure is lower than normal, it can indicate that a detachment is present.
  6. Uveitis: Tonometry can help diagnose uveitis by measuring the pressure inside the eye. Increased pressure can indicate the presence of uveitis.
  7. Corneal Abrasions: Tonometry can help diagnose corneal abrasions by measuring the pressure inside the eye. A decrease in pressure can indicate the presence of a corneal abrasion.
  8. Eye Tumors: Tonometry can help diagnose eye tumors by measuring the pressure inside the eye. A decrease in pressure can indicate that a tumor is present.
  9. Dry Eye Syndrome: Tonometry can help diagnose dry eye syndrome by measuring the pressure inside the eye. If the pressure is lower than normal, it can indicate that the eye is not producing enough tears.
  10. Optic Nerve Damage: Tonometry can help diagnose optic nerve damage by measuring the pressure inside the eye. An increase in pressure can indicate that there is damage to the optic nerve.

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Symptoms that require Tonometry

  1. Blurred vision: When you cannot see clearly, as if you are looking through a foggy window.
  2. Headaches: A throbbing pain in your head that can be mild to severe.
  3. Difficulty focusing: When you have trouble keeping an object in focus, such as reading a book or a computer screen.
  4. Double vision: Seeing two images instead of one when you look at something.
  5. Excessive tearing: When your eyes produce too many tears.
  6. Eye redness: When your eyes appear red, irritated, or swollen.
  7. Pain or discomfort: When your eyes feel sore or painful.
  8. Sensitivity to light: When bright lights bother or pain your eyes.
  9. Dry eyes: When your eyes feel dry or itchy or you have difficulty producing tears.
  10. Fluctuating vision: When your vision changes from time to time, such as blurriness or distortion.

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How Tonometry is done

  1. Tonometry is a test used to measure the pressure inside your eye. This test is usually done by an eye doctor and usually takes about 5 - 10 minutes to complete.
  2. When you come in for your appointment, you will be asked to sit in a chair in front of a machine, which is called a tonometer. The machine has a special device that is placed on your eye. This device will measure the pressure inside your eye. You may feel some slight pressure when the device is placed on your eye, but it should not be uncomfortable.
  3. The doctor will then look at the results and use them to determine whether or not you have any eye conditions related to pressure in your eyes. If the pressure is too high, it could be a sign of glaucoma.
  4. If you have any questions or concerns about the test, please let your doctor know. They will be more than happy to answer any questions you may have.

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How long will Tonometry take

  1. .
  2. The Tonometry test typically takes about 5 to 10 minutes. You will be asked to rest your chin on a chin rest and place your forehead against a headrest so that the doctor can measure the pressure within your eyes. Once the test is completed, the results are typically available immediately. If further testing or examination is needed, you may need to wait for the results to be interpreted and a diagnosis to be given.

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Reviewed By

Dr.Aditya Raut, MBBS, DOMS, Cataract and Refractive Surgeon, with experience of over 3000 cataract surgeries.

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Article Reviewed by Dr. Aditya Raut M.B.B.S D.O.MS Cataract Lasik and refractive surgeon
Specialist in number reduction surgery, Refractive Lens exchange and ICL surgery.

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