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Tonometry is a test to measure the pressure inside your eyes. The test is used to screen for glaucoma.
Alternative NamesIntraocular pressure (IOP) measurement; Glaucoma test
How the test is performedThere are several methods of testing for glaucoma.
The applanation method measures the force required to flatten a certain area of the cornea. A fine strip of paper stained with orange dye is touched to the side of the eye. The dye stains the front of the eye to help with the examination, then rinses out with tears. An anesthetic drop is also placed in the eye.
The slit-lamp is placed in front of you and you rest your chin and forehead on a support that keeps your head steady. The lamp is moved forward until the tonometer touches the cornea. The light is usually a blue circle. The health care provider looks through the eyepiece on the lamp and adjusts the tension on the tonometer. There is no discomfort associated with the test.
A slightly different method of applanation uses an object similar to pencil. Again, you are given numbing eye drops to prevent any discomfort. The device touches the outside of the eye and instantly records eye pressure.
The last method is the noncontact method (air puff). In this method, your chin rests on a padded stand. You stare straight into the examining device. The eye doctor shines a bright light into your eye to properly line up the instrument, and then delivers a brief puff of air at your eye. The machine measures eye pressure by looking at how the light reflections change as the air hits the eye.
How to prepare for the testRemove contact lenses before the examination. The dye can permanently stain contact lenses.
Inform the health care provider if you have corneal ulcers and infections, an eye infection, if you are taking any drugs, or if you have a history of glaucoma in your family.
How the test will feelIf numbing eye drops were used, you should not have any pain. In the noncontact method, you may feel mild pressure on your eye.
Why the test is performedPeople over age 40, especially African Americans, have the the highest risk for developing glaucoma. Regular eye exams can help detect glaucoma early, when it can usually be treated.
The test may also be done before and after eye surgery.
Normal ValuesA normal result means your eye pressure is within the normal range. Normal eye pressure range is 10 - 21 mmHg.
Note: Normal value ranges may vary slightly among different laboratories. Talk to your doctor about the meaning of your specific test results.
What abnormal results meanAbnormal results may be due to:
- Glaucoma
- Hyphema
- Trauma to the eye or head
If the applanation method is used, there is a small chance the cornea may be scratched (corneal abrasion). This will normally heal itself within a few days.
What else can I help you with?
Tonometry may be included in what type of examination?
Tonometry may be included in an eye examination to measure the intraocular pressure, which can help in diagnosing conditions such as glaucoma.
What does tonometry mean?
Tonometry is a diagnostic test conducted to measure the pressure inside the eye. It is commonly used to assess for conditions such as glaucoma, where increased intraocular pressure can damage the optic nerve and lead to vision loss. Tonometry can be performed using various methods, including 'air puff', applanation, or handheld devices.
How do you measure fluid pressure within the eye?
Fluid pressure within the eye is typically measured using a tonometer, which applies gentle pressure to the cornea to estimate the pressure within the eye. The most common method is called non-contact tonometry, which uses a puff of air to measure intraocular pressure. Another method is applanation tonometry, which involves flattening a small area of the cornea with a special tool to measure the pressure.
What is tonometry?
Tonometry exam
Is Goldmann an example of indentation tonometry?
no it is an applanation tonometry
Which test measures intraoculare pressure?
Tonometry is the test that measures intraocular pressure.
What does tonometry measure?
Tonometry measures intraocular pressure (i.e. checks for glaucoma).
What is the name of the test for glaucoma?
tonometry
Tonometry may be included in what type of examination?
Tonometry may be included in an eye examination to measure the intraocular pressure, which can help in diagnosing conditions such as glaucoma.
How do you monitor intraoccular pressure?
Tonometry is used to monitor IOP
Tonometry is the test used to assess hearing acuity?
False
What does tonometry mean?
Tonometry is a diagnostic test conducted to measure the pressure inside the eye. It is commonly used to assess for conditions such as glaucoma, where increased intraocular pressure can damage the optic nerve and lead to vision loss. Tonometry can be performed using various methods, including 'air puff', applanation, or handheld devices.
What procedure do they use to check to see if you have glaucoma?
Tonometry checks the pressure of the eye
What has the author Lawrence L Garner written?
Lawrence L. Garner has written: 'Tonography and the glaucomas' -- subject(s): Glaucoma, Tonometry
What kind of eye examination is required to test for cataracts?
There are three common ways: through a pupil dilation test, through tonometry, or through a visual acuity chart.
