CLINICAL STUDIES COMPARISON OF THE REBOUND TONOMETER (TONOVET) WITH THE APPLANATION TONOMETER (TONOPEN XL) IN NORMAL EURASIAN EAGLE OWLS (BUBO BUBO) Jeong Man-Bok, Kim Young-Jun, Yi Na-Young Park Shin-Ae, Kim Won-Tae, Kim Se-Eun, Chae Je-Min, Kim Jong-Taek, Lee Hang, Seo Kang-Moon Department of Veterinary Surgery and Ophthalmology, College of Veterinary Medicine and BK21 Program for Veterinary Science, Seoul National University, San 56-1, Sillim 9- dong, Gwanak-gu, Seoul 151-742, Korea; Laboratory of Wildlife Medicine, Department of Veterinary Medicine, Kang- won National University, 192-1 Hyoja-dong, Chuncheon, Kangwon-do 200-701, Korea; Conservation Genome Resource Bank for Korean Wildlife, College of Veterinary Medicine and BK21 Program for Veterinary Science, Seoul National University OBJECTIVE To examine the feasibility and accuracy of a handheld rebound tonometer, TONOVET, and to compare the intraocular pressure (IOP) readings of the TONOVET with those of an applanation tonometer, TonoPen XL , in normal Eurasian Eagle owls. ANIMALS STUDIED Ten clinically normal Eurasian Eagle owls (20 eyes). PROCEDURES Complete ocular examinations, using slit-lamp biomicroscopy and indirect ophthalmoscopy, were conducted on each raptor. The IOP was measured bilaterally using a rebound tonometer followed by a topical anesthetic agent after 1 min. The TonoPen XL tonometer was applied in both eyes 30 s following topical anesthesia. RESULTS The mean ± SD IOP obtained by rebound tonometer was 10.45 ± 1.64 mmHg (range 7-14 mmHg), and by applanation tonometer was 9.35 ± 1.81 mmHg (range 6-12 mmHg). There was a significant difference (P = 0.001) in the IOP obtained from both tonometers. The linear regression equation describing the relationship between both devices was y = 0.669x + 4.194 (x = TonoPen XL and y = TONOVET). The determination coefficient (r2) was r2 = 0.550. CONCLUSIONS The results suggest that readings from the rebound tonometer significantly overestimated those from the applanation tonometer and that the rebound tonometer was tolerated well because of the rapid and minimal stress-inducing method of tonometry in the Eurasian Eagle owls, even without topical anesthesia. Further studies comparing TONOVET with manometric measurements may be necessary to employ rebound tonometer for routine clinical use in Eurasian Eagle owls. © Veterinary Ophthalmology 2007 33
TONOVET DNA Clinical Studies, Articles, Testimonials Literature – LITJ1000-4
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