Unilateral ventral strabismus in an aquarium Silver Arowana (Osteoglossum bicirrhosum).

Publications // Richard Dubielzig // Nov 01 2016

PubMed ID: 26439990

Author(s): Chow DW, Westermeyer HD, Fernando N, Hoey S, Dubielzig RR. Unilateral ventral strabismus in an aquarium Silver Arowana (Osteoglossum bicirrhosum). Vet Ophthalmol. 2016 Nov;19(6):510-517. doi: 10.1111/vop.12320. Epub 2015 Oct 6. PMID 26439990

Journal: Veterinary Ophthalmology, Volume 19, Issue 6, Nov 2016

An adult silver arowana (Osteoglossum bicirrhosum) presented with a 2-month history of acute onset ventral strabismus of the right eye associated with a cystic structure overlying the dorsal aspect of the globe. Aspiration of the cyst, removal of redundant conjunctival tissue, and apposition of the surgical edges of the conjunctiva did not correct the strabismus. Magnetic resonance imaging of the head and histopathology of the eye did not reveal significant differences between affected and unaffected eyes except for a more posterior dorsal rectus muscle insertion site in the affected eye. This case report documents and describes a syndrome well known among arowana hobbyists as ‘drop eye’.

© 2015 American College of Veterinary Ophthalmologists.