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Glaucoma in a captive-bred great horned owl (Bubo virginianus virginianus)
  1. L. J. Rayment, BVetMed1 and
  2. D. Williams, MA, VetMB, PhD, CertVOphthal, MRCVS2
  1. 1 Stevenson, Larwood and Kennedy, 7 Wellington Road, Dereham, Norfolk NR19 2BP
  2. 2 Veterinary Basic Science Department, Royal Veterinary College, Royal College Street, Camden, London NWI OTU


A captive-bred adult great horned owl (Bubo virginianus virginianus) behaved as though it was bilaterally blind. An ophthalmological examination showed that it had an increased intraocular pressure in both eyes and gonioscopy showed an abnormality of the iridocorneal angles. Retinal changes were also observed. Treatment was not attempted and the owl was euthanased. Histopathology confirmed the abnormal iridocorneal angles, but the exact aetiology of the primary glaucoma was not identified.

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