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Related Experiment Videos

Retinal thickness in normal and RCD1 dogs using optical coherence tomography.

Carla Q Panzan1, Dilek Güven, James D Weiland

  • 1Doheny Retina Institute, Doheny Eye Institute, Department of Ophthalmology, Keck School of Medicine, University of Southern California, Los Angeles, California 90033, USA.

Ophthalmic Surgery, Lasers & Imaging : the Official Journal of the International Society for Imaging in the Eye
|December 8, 2004
PubMed
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Optical coherence tomography (OCT) revealed significant differences in retinal thickness between normal dogs and those with rod-cone dysplasia type 1 (RCD1). However, retinal nerve fiber layer (RNFL) thickness showed no significant variation between the groups.

Area of Science:

  • Veterinary Ophthalmology
  • Comparative Retinal Imaging
  • Animal Models of Disease

Background:

  • Rod-cone dysplasia type 1 (RCD1) is a genetic condition affecting vision in dogs.
  • Optical coherence tomography (OCT) is a non-invasive imaging technique for evaluating retinal structures.

Purpose of the Study:

  • To compare retinal thickness and retinal nerve fiber layer (RNFL) thickness in normal dogs versus dogs with RCD1 using OCT.
  • To assess the utility of OCT in canine retinal disease research.

Main Methods:

  • OCT imaging was performed on 8 eyes of 6 normal dogs and 12 eyes of 6 RCD1-affected dogs (2-5 years old).
  • Specific OCT protocols included Fast RNFL Thickness, Fast Macular Thickness, and line scans.

Main Results:

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  • Retinal thickness was greater in the tapetal fundus compared to the non-tapetal fundus in both normal and RCD1 dogs.
  • Normal dogs exhibited significantly higher superotemporal, superonasal, and inferior retinal thickness.
  • Area centralis thickness was significantly reduced in RCD1 dogs (136.16 ± 13.12 µm) compared to normal dogs (183.5 ± 10.66 µm).
  • No significant difference in RNFL thickness was observed between normal and RCD1 dogs.

Conclusions:

  • OCT is a valuable tool for evaluating retinal structure in dogs.
  • OCT can detect differences in retinal thickness associated with RCD1.
  • OCT shows promise for future research utilizing canine models of retinal disease.