Ophthalmology Tonometers, Applanation Manufacturers

Applanation tonometer is an instrument for determining ocular tension by application of a small flat disk to the cornea. In Applanation tonometry, a special calibrated sterile probe attached to a slit lamp biomicroscope to flatten part of the cornea. Because the probe makes contact with the cornea, a topical anesthetic, such as oxybuprocaine, tetracaine, alcaine, proxymetacaine or proparacaine is introduced onto the surface of the eye in the form of one or a few eye drops. A yellow fluorescein dye is used in conjunction with a cobalt blue filter to aid the examiner in determining the IOP.