Microphthalmia, aphakia and agenesis of the optic chiasm and tract in a wild fox squirrel (Sciurus niger)

ElsevierVolume 201, February 2023, Pages 109-113Journal of Comparative PathologyAuthor links open overlay panel, , , , Abstract

We describe gross and histopathological features of multiple ocular and neuro-ophthalmic abnormalities in a fox squirrel (Sciurus niger). Ophthalmic findings included severe bilateral microphthalmos, with the right eye more affected than the left. Histopathology confirmed severe microphthalmia, aphakia, disorganized retinal tissue and small optic nerves, as well as agenesis of the optic chiasm and optic tract. This combination of neuro-ophthalmic abnormalities has not been previously described in wild animals.

Keywords

aphakia

fox squirrel

microphthalmos

optic chiasm

optic tract

wildlife

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Published by Elsevier Ltd.

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