Check the listing for details. Tonometer Schiotz For Measuring The Intraocular Pressure Free Shipping Optometry. Condition: New. Listed at 46.99 USD. Item description from the sellerTonometer Schiotz For Measuring The Intraocular Pressure Free Shipping Optometry DESCRIPTIONSTonometer 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.SPECIFICATIONHigh 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.