Intraocular pressure was measured using standard Goldmann applanation
tonometry (AT 900 - Applanation
tonometer, Haag Streit AG, Germany).
and rebound tonometers are used widely in veterinary fields.
To confirm diagnosis, IOP was first measured with a non-contact tonometer, followed by Goldmann applanation
In healthy subjects, the increase in IOP between sitting and supine position was reported as 1.8 mmHg using Perkins applanation
tonometer, 2.5-3.9 mmHg with pneumotonometer, 1.2 mmHg with Tono-Pen, and 4.1 mmHg with Goldman applanation
Intraocular pressure was measured in both the eyes using Goldmann applanation
tonometer  by applying 0.05% proparacaine eye drops as topical anaesthesia and 2% fluorescein to stain tear film.
It is possible to measure the intraocular pressure of birds with applanation
tonometer (Tonopen[R]), which requires the instillation of topical anesthetic on the surface of the cornea 10 to 15s before the measurement, or a rebound tonometer (Tonovet[R], Tonovet Plus[R]), that doesn't require topical anesthesia (WILLIS & WILKIE, 1999; BAYON et al., 2007; WILLIAMS, 2012).
Participants underwent monthly ophthalmic examination for: (a) intraocular pressure (IOP) monitoring via Goldmann Applanation
Tonometry, (b) adverse event monitoring, (c) standardised BCVA assessment in ETDRS letters and (d) colour fundus photography.
The base line IOP was measured with the help of Goldman Applanation
According to the ophthalmological examination protocol, all patients were subjected to visual acuity test using Snellen chart; ocular tension measurement using Goldmann applanation
tonometer; biomicroscopic examination; central 10-degree visual field test using Octopus 900 (Interzeag AG, Schlieren-Zurich, Switzerland); fundus autofluorescence photography and color fundus photograph examination using Visucam NM/FA (Carl Zeiss, Germany), and macular RGC-IPL thickness and peripapillary retinal nerve fiber layer (RNFL) thickness measurements using Cirrus high-definition OCT, model 5000 (Carl Zeiss Meditec Inc., Jena, Germany).
Kim, M.D., from Emory University in Atlanta, and colleagues studied freshman ASF participants and non-athletic undergraduate controls with repeated measures echocardiography and applanation
tonometry before and after one competitive season.
Keratometry was done on Haag-Strait manual keratometer and A-scan was done by applanation
contact method on SonoMed machine.