OPHTHALMIC REFERENCE VALUES AND LESIONS IN TWO CAPTIVE POPULATIONS OF NORTHERN OWLS: GREAT GREY OWLS (STRIX NEBULOSA) AND SNOWY OWLS (BUBO SCANDIACUS)
This study established ophthalmic reference values and characterized ocular lesions in two captive populations of boreal owls, including 46 eyes of 23 great grey owls (Strix nebulosa) and 38 eyes from 19 snowy owls (Bubo scandiacus). A complete ophthalmologic exam was conducted, including neuro-opht...
Published in: | Journal of Zoo and Wildlife Medicine |
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American Association of Zoo Veterinarians
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ftbioone:10.1638/2015-0009.1 2023-07-30T04:02:44+02:00 OPHTHALMIC REFERENCE VALUES AND LESIONS IN TWO CAPTIVE POPULATIONS OF NORTHERN OWLS: GREAT GREY OWLS (STRIX NEBULOSA) AND SNOWY OWLS (BUBO SCANDIACUS) Sarah Wills Chantale Pinard Stephanie Nykamp Hugues Beaufrère Sarah Wills Chantale Pinard Stephanie Nykamp Hugues Beaufrère world 2016-03-01 text/HTML https://doi.org/10.1638/2015-0009.1 en eng American Association of Zoo Veterinarians doi:10.1638/2015-0009.1 All rights reserved. https://doi.org/10.1638/2015-0009.1 Text 2016 ftbioone https://doi.org/10.1638/2015-0009.1 2023-07-09T10:50:57Z This study established ophthalmic reference values and characterized ocular lesions in two captive populations of boreal owls, including 46 eyes of 23 great grey owls (Strix nebulosa) and 38 eyes from 19 snowy owls (Bubo scandiacus). A complete ophthalmologic exam was conducted, including neuro-ophthalmic reflexes, Schirmer tear test I (STT-I), intraocular pressure (IOP) using rebound tonometry, fluorescein staining, horizontal corneal measurements using Jameson calipers, direct and indirect ophthalmoscopy, and ocular ultrasound biometry. Eyes with an STT of <5 mm/min, outliers, and eyes with severe diseases were excluded from reference value analysis. No statistically significant differences were found between right or left eyes in either species or among individuals in different age groups and sexes. Mean intraocular pressures and Schirmer tear tests were also not statistically significantly different between great grey owls and snowy owls (IOP: 9.6 ± 2.6 mm Hg and 9.1 ± 1.9 mm Hg, respectively, and STT-I: 9.8 ± 2.8 mm/min and 9.8 ± 2.4 mm/min, respectively). However, snowy owls overall had a significantly larger eye than did great grey owls, reflected in corneal diameters (23.4 ± 1 vs. 20.0 ± 0.8 mm, respectively) and sonographic biometry. In both species, the most common ocular lesions included keratitis, cataracts, chorioretinal lesions, and abnormal pecten. Establishment of reference ocular parameters will help wildlife veterinarians and rehabilitators determine an appropriate treatment plan and will aid in correctly identifying the presence of ocular disease. Text Bubo scandiacus Strix nebulosa BioOne Online Journals Journal of Zoo and Wildlife Medicine 47 1 244 255 |
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description |
This study established ophthalmic reference values and characterized ocular lesions in two captive populations of boreal owls, including 46 eyes of 23 great grey owls (Strix nebulosa) and 38 eyes from 19 snowy owls (Bubo scandiacus). A complete ophthalmologic exam was conducted, including neuro-ophthalmic reflexes, Schirmer tear test I (STT-I), intraocular pressure (IOP) using rebound tonometry, fluorescein staining, horizontal corneal measurements using Jameson calipers, direct and indirect ophthalmoscopy, and ocular ultrasound biometry. Eyes with an STT of <5 mm/min, outliers, and eyes with severe diseases were excluded from reference value analysis. No statistically significant differences were found between right or left eyes in either species or among individuals in different age groups and sexes. Mean intraocular pressures and Schirmer tear tests were also not statistically significantly different between great grey owls and snowy owls (IOP: 9.6 ± 2.6 mm Hg and 9.1 ± 1.9 mm Hg, respectively, and STT-I: 9.8 ± 2.8 mm/min and 9.8 ± 2.4 mm/min, respectively). However, snowy owls overall had a significantly larger eye than did great grey owls, reflected in corneal diameters (23.4 ± 1 vs. 20.0 ± 0.8 mm, respectively) and sonographic biometry. In both species, the most common ocular lesions included keratitis, cataracts, chorioretinal lesions, and abnormal pecten. Establishment of reference ocular parameters will help wildlife veterinarians and rehabilitators determine an appropriate treatment plan and will aid in correctly identifying the presence of ocular disease. |
author2 |
Sarah Wills Chantale Pinard Stephanie Nykamp Hugues Beaufrère |
format |
Text |
author |
Sarah Wills Chantale Pinard Stephanie Nykamp Hugues Beaufrère |
spellingShingle |
Sarah Wills Chantale Pinard Stephanie Nykamp Hugues Beaufrère OPHTHALMIC REFERENCE VALUES AND LESIONS IN TWO CAPTIVE POPULATIONS OF NORTHERN OWLS: GREAT GREY OWLS (STRIX NEBULOSA) AND SNOWY OWLS (BUBO SCANDIACUS) |
author_facet |
Sarah Wills Chantale Pinard Stephanie Nykamp Hugues Beaufrère |
author_sort |
Sarah Wills |
title |
OPHTHALMIC REFERENCE VALUES AND LESIONS IN TWO CAPTIVE POPULATIONS OF NORTHERN OWLS: GREAT GREY OWLS (STRIX NEBULOSA) AND SNOWY OWLS (BUBO SCANDIACUS) |
title_short |
OPHTHALMIC REFERENCE VALUES AND LESIONS IN TWO CAPTIVE POPULATIONS OF NORTHERN OWLS: GREAT GREY OWLS (STRIX NEBULOSA) AND SNOWY OWLS (BUBO SCANDIACUS) |
title_full |
OPHTHALMIC REFERENCE VALUES AND LESIONS IN TWO CAPTIVE POPULATIONS OF NORTHERN OWLS: GREAT GREY OWLS (STRIX NEBULOSA) AND SNOWY OWLS (BUBO SCANDIACUS) |
title_fullStr |
OPHTHALMIC REFERENCE VALUES AND LESIONS IN TWO CAPTIVE POPULATIONS OF NORTHERN OWLS: GREAT GREY OWLS (STRIX NEBULOSA) AND SNOWY OWLS (BUBO SCANDIACUS) |
title_full_unstemmed |
OPHTHALMIC REFERENCE VALUES AND LESIONS IN TWO CAPTIVE POPULATIONS OF NORTHERN OWLS: GREAT GREY OWLS (STRIX NEBULOSA) AND SNOWY OWLS (BUBO SCANDIACUS) |
title_sort |
ophthalmic reference values and lesions in two captive populations of northern owls: great grey owls (strix nebulosa) and snowy owls (bubo scandiacus) |
publisher |
American Association of Zoo Veterinarians |
publishDate |
2016 |
url |
https://doi.org/10.1638/2015-0009.1 |
op_coverage |
world |
genre |
Bubo scandiacus Strix nebulosa |
genre_facet |
Bubo scandiacus Strix nebulosa |
op_source |
https://doi.org/10.1638/2015-0009.1 |
op_relation |
doi:10.1638/2015-0009.1 |
op_rights |
All rights reserved. |
op_doi |
https://doi.org/10.1638/2015-0009.1 |
container_title |
Journal of Zoo and Wildlife Medicine |
container_volume |
47 |
container_issue |
1 |
container_start_page |
244 |
op_container_end_page |
255 |
_version_ |
1772813561680101376 |