Table I.
Published values for intraocular pressure (IOP) in ruminants using different tonometers.
| Study | Species and breed | Number of animals (N) | Mean IOP ± SD (mmHg) | Tonometer |
|---|---|---|---|---|
| Gum et al, 1998 (12) | Cattle (Holstein-Fresian, Jersey) | 32 | 27.5 ± 4.8 | Mackay-Marg |
| 27 | 28.2 ± 4.6 | |||
| 27 | 26.9 ± 6.7 | Tono-Pen XL | ||
| Kotani, 1993 (19) | Cattle | 23.4 ± 5.9 | Mackay-Marg | |
| Andrade et al, 2011 (5) | Horses and cattle | 10 | 18.8 ± 1.7 | Perkins |
| Tofflemire et al, 2015 (20) | Cattle calves (Holstein) | 33 | 15.2 ± 5.2 | TonoVet |
| Gerometta et al, 2009 (21) | Sheep (Corriedale) | 18 | 10.6 ± 1.4 | Perkins |
| Ribeiro et al, 2014 (22) | Sheep (Santa Ines) | 10 | OS 12.70 ± 1.09 | Tono-Pen XL |
| OD 13.90 ± 0.84 | ||||
| Broadwater et al, 2007 (6) | Goats (Pygmy) | 10 | 11.8 ± 1.5 | TonoVet |
| 10.8 ± 1.7 | Tono-Pen XL |
SD — standard deviation; OS — oculus sinister; OD — oculus dexter.