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Unilateral microphthalmia or anophthalmia in eight pythons (Pythonidae).

Mari-Ann O Da Silva1, Mads F Bertelsen, Tobias Wang

  • 1Center for Zoo and Wild Animal Health, Copenhagen Zoo, Roskildevej 38, DK-1870, Frederiksberg, Denmark; Department of Neuroscience and Pharmacology, Eye Pathology Institute, University of Copenhagen, Copenhagen, Denmark.

Veterinary Ophthalmology
|August 19, 2014
PubMed
Summary

This study describes microphthalmia or anophthalmia in eight pythons, revealing malformed ocular structures and fetal remnants in affected orbits. These findings contribute to understanding this uncommon condition in snakes.

Keywords:
anophthalmiaeyemicrophthalmiapythonunilateral

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Area of Science:

  • Veterinary Ophthalmology
  • Herpetology
  • Developmental Biology

Background:

  • Unilateral microphthalmia and anophthalmia are observed in snakes but infrequently described.
  • Understanding the morphological basis of these conditions is crucial for veterinary diagnostics.

Purpose of the Study:

  • To provide detailed morphological descriptions of microphthalmia or anophthalmia in pythons.
  • To utilize advanced imaging and histopathology for precise characterization of ocular malformations.

Main Methods:

  • Examination of eight pythons (seven Burmese pythons, one ball python) with unilateral ocular abnormalities.
  • Application of microcomputerized tomography (μCT), magnetic resonance imaging (MRI), and histopathology.
  • Necropsy was performed on four individuals for gross examination.

Main Results:

  • All snakes exhibited left ocular openings as dermal invaginations and malformed orbital bones.
  • Limited nervous, glandular, and muscle tissue were present in the posterior orbit.
  • Remnants of fetal structures, including hyaloid vessels, were identified in anophthalmic snakes.

Conclusions:

  • The study details unilateral microphthalmia/anophthalmia in pythons, characterized by malformed ocular structures and fetal remnants.
  • These findings enhance the understanding of a condition rarely documented in snake species.
  • The research provides valuable data for veterinary professionals dealing with congenital ocular defects in reptiles.