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Computed tomography measurements of intraocular structures of the feline eye
  1. Shawn Sreenivasan Chandrakumar1,
  2. Alex zur Linden2,
  3. Mark Owen1,3,
  4. Sarah Pemberton1,3,
  5. Chantale L Pinard2,
  6. Arata Matsuyama4 and
  7. Valerie J Poirier1,2
  1. 1 School of Veterinary Science, Massey University, Palmerston North, New Zealand
  2. 2 Department of Clinical Studies, University of Guelph Ontario Veterinary College, Guelph, Ontario, Canada
  3. 3 NZ Rad Vet, Palmerston North, New Zealand
  4. 4 Department of Biomedical Sciences, University of Guelph Ontario Veterinary College, Guelph, Ontario, Canada
  1. E-mail for correspondence; vpoirier{at}


Diagnostic imaging of the eye can be performed using ultrasonography, MRI or CT. This study describes the CT dimensions, volumes and radiodensities of presumed normal feline intraocular structures. Nineteen adult patients were included in this retrospective study. Fourteen males and five females were included, with domestic short hair (DSH) being the predominant breed. Length, volume and radiodensity values for the lens, anterior chamber, vitreous chamber and optic nerve were calculated as well as measurements of the optic nerve width. There was no significant correlation found on linear regression analysis comparing patient’s body weight with the various ocular measurements. Measurements of the lens, globe and optic nerve had significant differences (P<0.05) noted between the sexes, with males having increased values. These results may be skewed due to the large majority of male patients in the study. There was a weak correlation found between age and right eye (OD) optic nerve width, with an increase in the optic nerve width noted with increasing age. The findings of this study are a first step in establishing CT reference values for feline intraocular structure measurements.

  • eyes
  • cats
  • Computed Tomography (ct)
  • imaging
  • ophthalmology
  • radiography
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  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

  • Competing interests None declared.

  • Provenance and peer review Not commissioned; externally peer reviewed.

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