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What is an applanation?
An applanation is a flattening of the cornea, especially by the application of pressure.
Is Goldmann an example of indentation tonometry?
no it is an applanation tonometry
What does a doctor sees in eye in normal eye check up?
First they will check your vision, if you need correction based on that test they do a refraction (the machine with all the lenses where they ask you "better 1, or better 2?". After they get your glasses rx, if needed, they will check your intraocular pressure using either a tonopen, applanation or non-menthol contact applanation (the air puff), but they will put a numbing drop in your eye so you won't feel anything. Next they dilate your eye (make your pupil big) and then check the back of your eye (retina, optic nerve, macula, blood vessels). A lot depends on age and health, but those are the basic things they look for in an regular eye exam.
Which test measures intraoculare pressure?
Tonometry is the test that measures intraocular pressure.
Tonometry?
DefinitionTonometry is a test to measure the pressure inside your eyes. The test is used to screen for glaucoma.Alternative NamesIntraocular pressure (IOP) measurement; Glaucoma testHow 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:GlaucomaHyphemaTrauma to the eye or headWhat the risks areIf 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.
