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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Ocular examinations included evaluation of Snellen best spectacle corrected visual acuity (BCVA), biomicroscopy of the anterior segment, intraocular pressure (IOP) measurement with Goldmann applanation tonometer or Tonopen, and fundus examination.
Intraocular pressure was measured with Tonopen tonometer.
The efficacy of TonoLab in detecting physiological and pharmacological changes of mouse intraocular pressure – Comparison with TonoPen and microneedle manometery.
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.
Otros tonometros portatiles, como el Tonopen, tienen mucha utilidad en programas de tamizaje.
Tenders are invited for Tonopen (Digital Tonometer)
Within-day and between-day precision was checked for each tool and because our GAT and Tonopen are older than 1 year, the calibration error of the tools is routinely checked on a daily basis and the non-contact tonometer was calibrated once a month as recommended by the manufacturers.
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.
Comparison of goldmann applanation tonometer, noncontact tonometer, and TonoPen XL for intraocular pressure measurement in different types of glaucomatous, ocular hypertensive, and normal eyes.
Tenders are invited for Supply of Direct Ophthalmoscope, Tonopen Vet, Video Endoscope with Multipurpose Different Flexible/Rigid Fiber Optic Scopes with Accessories, Hematological Auto Analyzer, for College Of Veterinary Science & Animal Husbandry.