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Ocular Pressure Measurement (IOP)

Tonometry is a technique for measuring the intra-ocular pressure (IOP). Tonometry Schiozt wear hand-held metal instrument (tonometer) is placed on the surface of the anesthetized cornea. The results vary, but good enough to estimate the IOP. Other pressure measuring devices, applanation tonometry of Goldman, associated with the slit lamp to measure IOP. Considered a form of IOP measurement tool most accurate.

Provision of fluorescent dyes and topical anesthesia is required before applanation tonometry. IOP can also be measured by pneumotonometer, which gives a small air spray into the eye to measure the pressure. This method is especially useful when unwanted contact with the cornea. Assessing IOP is a regular component in a comprehensive eye examination and pressure should be measured frequently in patients with glaucoma or are at risk of intra-ocular hypertension.

Determination general IOP can be done by providing a light finger pressure on the sclera eyes closed. The two middle fingers are placed on the upper eyelids closed. One finger pressed gently into while the other fingers to feel the rigors of the pressure generated against it. Some examiners then compare the perceived pressure. When done well, this maneuver can give a rough estimate, and requires practice. However, if need an accurate measurement, tonometry needs to be done. Hydration can be assessed by palpating the patient's intraocular tension. The eyeball is soft is a sign of dehydration.
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