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KMID : 1094020120290040344
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Journal of Veterinary Clinics
2012 Volume.29 No. 4 p.344 ~ p.347
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A Case of Congenital Progressive Bilateral Convergent & Divergent Strabismus with Unilateral Exophthalmus in Holstein Cattle
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Jung Young-Hun
Hur Tai-Young
Choe Chang-Yong
Kang Seog-Jin
Lee Hyung-June
Ki Kwang-Seok
Park Yong-Sang
Suh Guk-Hyun
Kim Jong-Taek
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Abstract
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Bilateral convergent strabismus with exophthalmus(BCSE) is an eye disorder affecting many cattle breeds worldwide. BCSE is the most common in cattle at various types of strabismus. Divergent strabismus is of relativelylow incidence than convergent strabismus. This report is the to shown a case of convergent and divergent strabismus with unilateral in the exophthalmus in a heifer Holstein cow. A female Holstein calf born with congenital progressive divergent strabismus in right eye and convergent strabismus in left eye was tested. Ocular and blood examination, and activity were checked from the first week, 8 month, and 16 month after birth. The ocular examination includes general inspection, fixation reflex and menace response. The general inspection is checking the degree of deviation of both eyes from the normal visual axis, which was determined by the amount of sclera permanently visible in the temporal corner of the eye. The stage is divided into 4 stages depending on the degree of deviation. The right eye shown in stage 4 continues after birth and the left eye shown stage 2, stage 3 and stage 4 at 1 week, 8 month and 16 month after birth, respectively. In fixation reflex and Menace response, both eye balls showed a normal response at 1 week, 8 month and 16 month after birth. Blood count and serum chemistry test were performed, but a specific factor was not detected outside the reference range.
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KEYWORD
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bilateral, divergent, strabismus, exophthalmus, Holstein
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