Tonopen

Tonopen 

A handheld, compact, portable applanation tonometer based on the same principle as the Mackay-Marg tonometer. It is a very small instrument, 18 cm long by 2 cm in width weighing 56 g. It incorporates its own battery power supply and liquid crystal digital readout and provides both an intraocular pressure readout and an indicator of the reliability of the instrument. The results correlate well with the Goldmann tonometer, although it slightly overestimates low IOPs and underestimates high IOPs. It can take measurements in an eye with an irregular or oedematous cornea or through a soft contact lens and in a variety of clinical settings (Fig. T17). See applanation tonometer.
Fig. T17 Tonopenenlarge picture
Fig. T17 Tonopen
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Tenders are invited for Supply and installation of b scan, indirect ophthalmoscope, electro oculography, tonopen and green laser to strengthening of medical colleges, district and subdistrict hospitals in the state.
Goldmann applanation tonometry (GAT), the gold-standard method for the measurement of IOP, and related techniques such as NCT and TonoPen, use the Imbert-Fick principle to determine this value.
Initial and follow-up examinations documented Snellen visual acuity and included slit lamp biomicroscopy, Tonopen intraocular pressure measurement, and indirect ophthalmoscopy.
Tenders are invited for Tender For Supply And Installation Of B Scan, Indirect Ophthalmoscope, Electro Oculography, Tonopen And Green Laser To Strengthening Of Medical Colleges, District And Subdistr
Diaton tonometer in Keratoconus study: Tonometric Values of Intraocular Pressure, Using the Goldmann Tonometer, Tonopen and Diaton Transpalpebral Tonometer in Keratoconus
Visitors can explore the benefits of the Optopol Spectral OCT combined with retinal imaging, consider a Pascal Dynamic Contour Tonometer for the most accurate IOP independent of corneal thickness, try the hand-held Tonopen AVIA applanation tonometer, and compare the new Takagi Soft Non-Contact Tonometer and the new Canon non-contact Tonometer/Pachymeter.
To our knowledge, there are no published reference values for normal IOP in western screech owls, therefore, the reference interval for normal eastern screech owls (Megascops asio) established using the TonoPen XL was used (reference interval 7-16 mm Hg).
26) This effect also appears to be present in all other tonometers that rely on corneal manipulation to estimate IOP, including non-contact and Perkins tonometry, as well as the TonoPen.
I am particularly excited about the potential to link the TonoPen product line to the rapidly expanding LASIK surgery market via a product enhancement currently in development.
Several years ago, we purchased a TonoPen applanation tomometer which did provide us a much improved capability to measure intraocular pressure.