This two year old Irish Wolfhound is presented with a gradual loss of vision in this eye. What is wrong and what might you do to investigate and treat?
The dog has almost complete medial strabismus with the eye so inturned that vision is no longer possible. A forced duction test (ophthalmic jargon for trying to tug the eye around after judicious use of local anaesthetic!) showed the strabismus to be restrictive, rather like stranismus fixus in people. An orbital ultrasound (sorry its not the best in the world!) showed a substantial mass of fibrous tissue fixating the globe medially. We resected this and plicated the lateral rectus to bring the eye around, as you will see in the next question…..