Check the listing for details. Schiotz Tonometer For Measuring The Intraocular Pressure Ophthalmology Tonometer. Condition: New. Listed at 34.58 USD. DESCRIPTIONS Tonometer according to Prof. Schiotz for measuring the Intraocular pressure. All main parts are made of High-Quality Brass and are chrome plated. Red needle enables easy reading of the scale. The instrument comes complete with 3 weights (5.5-gram, 7.5-gram, 10 gram) and conversion table in Blue Presentation case. SPECIFICATION High quality agate bearing for an extremely long service life. Precision measurement on a scale of 0 to 20 subdivisions and 0 to -1 sub-divisions. Perfect reading of the scale with red pointer, All vital parts are made of stainless steel, other parts are chrome-plated Complete in a blue deluxe case. Supplied with three weights (5.5 g, 7.5 g, 10 g) and a conversion table.