Anatomical study of the scleral ring and eyeball of the long‐eared owl (Asio otus) with anatomical methods and diagnostic imaging techniques
Abstract Background The scleral ring in birds consists of ossicles that are fixed as small plates by cartilage joints and have no articulation to other parts of the skeleton. Objective Due to inadequate examination of the scleral ring anatomy and its specific form in owls, this study aimed to invest...
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| Format: | Article |
| Language: | English |
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Wiley
2022-07-01
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| Series: | Veterinary Medicine and Science |
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| Online Access: | https://doi.org/10.1002/vms3.823 |
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| author | Omid Zehtabvar Majid Masoudifard Okan Ekim Faezeh Ghorbani Somaye Davudypoor Iman Memarian Paniz Zarghami Dastjerdi |
| author_facet | Omid Zehtabvar Majid Masoudifard Okan Ekim Faezeh Ghorbani Somaye Davudypoor Iman Memarian Paniz Zarghami Dastjerdi |
| author_sort | Omid Zehtabvar |
| collection | DOAJ |
| description | Abstract Background The scleral ring in birds consists of ossicles that are fixed as small plates by cartilage joints and have no articulation to other parts of the skeleton. Objective Due to inadequate examination of the scleral ring anatomy and its specific form in owls, this study aimed to investigate the exact structure of the scleral ring and some morphometric characteristics of the eyeball in a long‐eared owl (Asio otus). Methods The eyes of 20 alive and 10 dead male and female owls were examined. In addition to common anatomical methods, computed tomography scans and radiographic and ultrasonographic imaging techniques were used in this study. Results The structure consisted of 15 ossicles. In the ventral part of the ring, these tubercles were observed in the scleral rings of all owls; in each ring, there were four bones with these tubercles. Additionally, there was no significant difference between the left and right eye parameters. Most ocular parameters in female owls were larger than those in males, but in the case of some parameters, such as optic nerve length and optic nerve sheath diameter, this difference was not observed. Conclusions According to this study, the scleral ring in the Asio otus has anterior and posterior parts, and the lens is in the immediate vicinity of the anterior part. The right and left scleral rings and eyeballs are bilaterally symmetrical in terms of the shape, size, and number of ossicles that form the ring. |
| first_indexed | 2024-04-13T05:29:07Z |
| format | Article |
| id | doaj.art-25402af009c74ddebaac2fa6d2c3d4fd |
| institution | Directory Open Access Journal |
| issn | 2053-1095 |
| language | English |
| last_indexed | 2024-04-13T05:29:07Z |
| publishDate | 2022-07-01 |
| publisher | Wiley |
| record_format | Article |
| series | Veterinary Medicine and Science |
| spelling | doaj.art-25402af009c74ddebaac2fa6d2c3d4fd2022-12-22T03:00:30ZengWileyVeterinary Medicine and Science2053-10952022-07-01841735174910.1002/vms3.823Anatomical study of the scleral ring and eyeball of the long‐eared owl (Asio otus) with anatomical methods and diagnostic imaging techniquesOmid Zehtabvar0Majid Masoudifard1Okan Ekim2Faezeh Ghorbani3Somaye Davudypoor4Iman Memarian5Paniz Zarghami Dastjerdi6Anatomy Sector, Department of Basic Sciences Faculty of Veterinary Medicine University of Tehran Tehran IranDepartment of Surgery and Radiology Faculty of Veterinary Medicine University of Tehran Tehran IranDepartment of Anatomy Faculty of Veterinary Medicine Ankara University Ankara TurkeyGraduated DVM Student Faculty of Veterinary Medicine, University of Tehran Tehran IranVeterinary Radiologist, DVM, DVSc Graduated from Faculty of Veterinary Medicine, University of Tehran Tehran IranFPWC (Foundation for the Preservation of Wildlife Cultural Assets) IAR (International Animal Rescue) Felid Tag, Deer Tag Persian Leopard and Cat Specialist Group (IUCN) Veterin Advisor Yerevan ArmeniaGraduated DVM Student Faculty of Veterinary Medicine, University of Tehran Tehran IranAbstract Background The scleral ring in birds consists of ossicles that are fixed as small plates by cartilage joints and have no articulation to other parts of the skeleton. Objective Due to inadequate examination of the scleral ring anatomy and its specific form in owls, this study aimed to investigate the exact structure of the scleral ring and some morphometric characteristics of the eyeball in a long‐eared owl (Asio otus). Methods The eyes of 20 alive and 10 dead male and female owls were examined. In addition to common anatomical methods, computed tomography scans and radiographic and ultrasonographic imaging techniques were used in this study. Results The structure consisted of 15 ossicles. In the ventral part of the ring, these tubercles were observed in the scleral rings of all owls; in each ring, there were four bones with these tubercles. Additionally, there was no significant difference between the left and right eye parameters. Most ocular parameters in female owls were larger than those in males, but in the case of some parameters, such as optic nerve length and optic nerve sheath diameter, this difference was not observed. Conclusions According to this study, the scleral ring in the Asio otus has anterior and posterior parts, and the lens is in the immediate vicinity of the anterior part. The right and left scleral rings and eyeballs are bilaterally symmetrical in terms of the shape, size, and number of ossicles that form the ring.https://doi.org/10.1002/vms3.823computed tomographic scanCT anatomylong‐eared owlscleral ring |
| spellingShingle | Omid Zehtabvar Majid Masoudifard Okan Ekim Faezeh Ghorbani Somaye Davudypoor Iman Memarian Paniz Zarghami Dastjerdi Anatomical study of the scleral ring and eyeball of the long‐eared owl (Asio otus) with anatomical methods and diagnostic imaging techniques Veterinary Medicine and Science computed tomographic scan CT anatomy long‐eared owl scleral ring |
| title | Anatomical study of the scleral ring and eyeball of the long‐eared owl (Asio otus) with anatomical methods and diagnostic imaging techniques |
| title_full | Anatomical study of the scleral ring and eyeball of the long‐eared owl (Asio otus) with anatomical methods and diagnostic imaging techniques |
| title_fullStr | Anatomical study of the scleral ring and eyeball of the long‐eared owl (Asio otus) with anatomical methods and diagnostic imaging techniques |
| title_full_unstemmed | Anatomical study of the scleral ring and eyeball of the long‐eared owl (Asio otus) with anatomical methods and diagnostic imaging techniques |
| title_short | Anatomical study of the scleral ring and eyeball of the long‐eared owl (Asio otus) with anatomical methods and diagnostic imaging techniques |
| title_sort | anatomical study of the scleral ring and eyeball of the long eared owl asio otus with anatomical methods and diagnostic imaging techniques |
| topic | computed tomographic scan CT anatomy long‐eared owl scleral ring |
| url | https://doi.org/10.1002/vms3.823 |
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