Ocular Barraquer 15-21mm HG (Phaco & SLIP) Tonometer features the Terry dual calibration scale. Useful for many surgical applications. The 15-21 is an excellent tool for vitreoretinal surgery during gas-fluid exchange. OBT-TC-15-21 Barraquer Tonometer is based on Maklakovís principle of applanation tonometry consisting of a conical shaft of high-density transparent plastic, a silicone retaining ring, and a slip ring handle. Tonometer is identified as to mm Hg. on the anterior surface. Instrument of 15-21mm Hg bears an engraved dual ring reticle on the endpoint indicating a predetermined intraocular pressure.The reticle measurements on the endpoints have been adapted from the Posner tables of calculations.
- Contact Diameter: 10mm
- Lens Height: 23.5mm