IOP is the fluid pressure inside the eye. Applanation tonometry is a procedure performed to determine the intraocular pressure (IOP).
This pressure of the eye should be controlled for the special purpose of preserving sight in sight-threatening conditions such as glaucoma since the condition can cause asymptomatic and irreversible loss of vision if poorly treated or neglected.
The effect of glaucoma treatment on the eye pressure may not always be constant and needs to be regularly measured. Hence, the intra ocular pressure check is an integral part of the examination and regular follow ups for a glaucoma patient.
In applanation tonometry the intraocular pressure (IOP) is inferred from the force required to flatten (applanate) a constant area of the cornea, Because the probe makes contact with the cornea, a topical anesthetic, is introduced on to the surface of the eye in the form of an eye drop.
The procedure takes about 1 min for both eyes.
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