Measurement of intraocular pressure in healthy unanesthetized inland bearded dragons (Pogona vitticeps)

Schuster, Eva J.; Strueve, Julia; Fehr, Michael J.; Mathes, Karina

doi:10.2460/ajvr.76.6.494

Cited by 13 publications

(1 citation statement)

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“…Studies on rabbit IOP utilizing rebound tonometer (Tonovet ® ) and applanation tonometer (Tono-Pen Avia ® ) determined a significantly higher IOP value in the morning compared to that later in the day, which has been reported to be associated with the transition from the dark phase to the light phase (Pereira et al, 2011). Schuster et al (2015) in a study on IOP measurements of 56 dragons with rebound tonometry have set a higher value in the morning compared to that taken later in the day. Similarly to this, as well as to that of Giannetto et al (2009) on healthy dogs and Gelatt et al (1981) on healthy and glaucomatous beagles the present study determined IOP value in the morning (16.21±2.10 mmHg) reduced about 22% when ration to that (12.65±2.01 mmHg) late in the day.…”

Section: Discussionmentioning

confidence: 96%

Evaluation of Intraocular Pressure (IOP) Regarding Circadian Rhythm, Age, Sex and Eye Side in Awassi Sheep

Kulualp

Kiliҫ

ÇAKIR

et al. 2018

J Hellenic Vet Med Soc

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Measurement of intraocular pressure (IOP) in domestic animals has become a part of routine eye examination with advent of applanation tonometer. Delayed control of high IOP may lead to permanent blindness due to retinal ganglion cells dysfunction and optic nerve degeneration. This study aimed at evaluating IOP of Awassi sheep with respect to circadian rhythm, age, sex and eye sides and finally to establish a reference (baseline, normal) IOP value for this particular species. A total of 24 healthy sheep with different ages and sexes were used. The animals were divided into 2 equal groups, <1 (6 male, 6 female, n = 12) and ≥1 (6 male, 6 female, n = 12) years old. IOP measurements were performed twice, in the morning (6:00 a.m.) and in the evening (8:00 p.m.) with Tono-pen Vet® applanation tonometer. Mean IOP in the animals decreased from 16.21 mmHg in the morning to 12.65 mmHg in the evening with an approximately rate of 22% (P <0.0001). Comparison of mean IOP values of right eyes (n=12) to the left (n=12), male (n=48) to female (n=48), and ages < 1 (n=48) to ≥ 1 (n=48) showed no difference (P >0.05). The reference IOP for this animal was calculated as 14.43±2.72 mmHg notwithstanding any variable. It was concluded that in this breed IOP values can vary significantly as far as circadian rhythm is concerned and Tono-pen Vet® can be used for sheep IOP measurement as an alternative to other applanation tonometry.

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Section: Discussionmentioning

confidence: 96%