The University of Georgia Department of Pathology Ophthalmic Services are available to all veterinarians outside the State of Georgia.
Georgia Veterinarians should send their samples to the Athens Diagnostic Laboratory.
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Submission
of Eyes to the Ophthalmic Pathology Service
Diagnostic evaluation of the eye can be
a rewarding experience for clinician and pathologist alike if
a
few cardinal rules of removal and fixation are followed:
- Submission forms must be filled out completely and accompany samples submitted to thie ophthalmic service.
- A good
history with detailed results of the ophthalmic examination of
the
diseased eye prior to enucleation is invaluable.
- The type and location
of a lesion within the eye should be recorded and can be supplemented
with drawings, especially of the cornea, lens and retina, if
pertinent.
This will aid in the pathologist's localization of the lesion in
the submitted globe.
- The intact globe should be placed in fixative
as soon after removal as possible, as many structures (e.g the
retina)
undergo rapid autolysis
- Some special fixatives such as Davidson's
solution are preferable to formalin for fixation of intact globes.
Davidson's solution rapidly penetrates the sclera for better
fixation
with fewer artifacts and softens the lens making it easier to section
and evaluate. Adequate Davidson's solution for the submission
of
a canine or feline eye can be easily made by combining 30 ml 95%
ethanol, 20 ml neutral buffered formalin, 10 ml glacial acetic
acid, and 30 ml distilled water.
- Each eye should be submitted in separate container
with a large enough opening to ensure easy removal. It is important
to leave at least 5 mm of optic nerve attached to the back of the
globe to prevent the creation of an artifactual opening in the back
of the globe. Do NOT cut holes in the sclera, or inject the globe
with fixative as this will induce artifacts such as retinal detachment.
- It is advisable to remove all extraocular tissue such as glandular
tissue, muscle and fat to allow penetration of the fixative. If
histological examination of the extraocular tissue is desired, it
can be submitted within the same container. Remember that the tissues
should be submitted in at least 10 times their volume of fixative.
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