Schiotz Tonometer

The Schiötz tonometer is a mechanical device used to measure intraocular pressure (IOP), which is crucial for diagnosing and monitoring glaucoma and other eye conditions where pressure inside the eye may be elevated. It is one of the earliest types of tonometers and operates on the principle of indentation tonometry, where the cornea is indented by a known weight, and the depth of the indentation is used to calculate the IOP. Schiötz tonometer is a basic, mechanical tool used to measure intraocular pressure through the indentation method. Though largely replaced by more accurate and automated devices, it remains useful in low-resource settings for diagnosing and monitoring glaucoma.

Key Features

Indentation method:Unlike applanation tonometers that flatten the cornea, the Schiötz tonometer indents it. The amount of indentation caused by a known weight is used to estimate intraocular pressure.
Plunger and scale system: The device has a plunger that rests on the cornea, and the scale on the tonometer measures how much the plunger is displaced (or indented) by the pressure within the eye.
Different weights: The tonometer comes with a set of small weights that can be added to the plunger. The higher the intraocular pressure, the less the cornea will indent with the applied weight.
Manual readings:The degree of indentation is measured manually using a calibrated scale on the tonometer, and a conversion table is used to translate these readings into millimeters of mercury (mmHg), the standard unit for measuring IOP.

Schiotz Tonometer

Key Features

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Schiotz Tonometer

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