Ophthalmic examination findings in a colony of Screech owls (Megascops asio)

Veterinary Ophthalmology
M C HarrisJ P Pickett

Abstract

To report ophthalmic findings in the Screech owl (Megascops asio). Sample population Twenty-three, apparently healthy adult captive Screech owls in Maryland. OU of all owls underwent complete ophthalmic examination. One randomly assigned eye of each bird was measured by phenol red thread tear test (PRT), and the other eye by Schirmer tear test (STT). TonoVet rebound tonometry and TonoPen-XL applanation tonometry were performed in each eye to measure IOP. Conjunctival swabs were cultured from one eye of 10 birds, corneal diameter was measured in OU of eight birds, and streak retinoscopy was performed on OU of seven birds. Ten birds were anesthetized, and A-scan ultrasonography using a 15-MHz probe was performed to obtain axial intraocular measurements. Ophthalmic abnormalities were noted in 24/46 (52%) of eyes. Median STT result was < or = 2 mm/min, ranging < or = 2-6 mm/min, and mean +/- SD PRT was 15 +/- 4.3 mm/15 s. Mean +/- SD IOP were 9 +/- 1.8 mmHg TonoVet-P, 14 +/- 2.4 mmHg TonoVet-D, and 11 +/- 1.9 mmHg TonoPen-XL. Coagulase negative staphylococcal organisms were cultured from all conjunctival swabs. Mean +/- SD corneal dimensions were 14.5 +/- 0.5 mm vertically and 15.25 +/- 0.5 mm horizontally. All refracted birds were...Continue Reading

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Citations

Jan 13, 2004·Journal of Biomedical Optics·Wolfgang Drexler
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