<center>'''What is the most likely diagnosis?'''</center>
<center>'''What is the most likely diagnosis?'''</center>
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<center>A 10-week-old foal in good body condition showed signs of acute dyspnoea.</center>
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A four-year-old Sealyham Terrier presented with acute onset unilateral (right) ocular pain. There was marked blepharospasm and excessive lacrimation. Initial examination revealed episcleral congestion and mild corneal edema. The pupil was semidilated and non-responsive to light. The iris was bowed posteriorly but the fundus appeared normal, although the dog was blind on this side.
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