The most commonly used tonometers are the TonoPen
XL (Reichart; Depew, NY, USA; applanation tonometer) and the TonoVet (Icare; Tiolat, Helsinki, Finland; rebound tonometer).
Measurement of the difference in intraocular pressure between the sitting and lying body positions in healthy subjects: direct comparison of the Icare Pro with the Goldmann applanation tonometer, Pneumatonometer and Tonopen
Comparison of the rebound tonometer (TonoVet[R]) with the applanation tonometer (TonoPen
XL[R]) in normal eurasian eagle owls (Bubo bubo)" Veterinary Ophthalmology, v.10, n.6, p.376-79, 2007.
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.
is a popular applanation tonometer based on the Mackay-Marg principle.
From existing tonometers only the TonoPen
combines these capabilities and above all, it is a standard reference instrument widely used by ophthalmologists.
Nowadays, several methods of IOP measurement have been developed for clinical use, including the gold-standard Goldmann applanation tonometer (GAT), the dynamic contour tonometer (DCT), TonoPen
, and Icare rebound tonometer.
The efficacy of TonoLab in detecting physiological and pharmacological changes of mouse intraocular pressure – Comparison with TonoPen
and microneedle manometery.
XL (Mentor, USA) tonometer was used to assess IOP in conscious, non-sedated rats as described previously (22).
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.
Heuer et al., "Clinical evaluation of the Oculab Tonopen
," American Journal of Ophthalmology, vol.
XL assessment of intraocular pressure through silicone hydrogel contact lenses.