This old diabetic dog has had cataracts for four years now – his owner says he gets around well and hasn’t the money for surgery. But over the past week he has developed this red eye – what might be going on?
The dog could have uveitis or glaucome both of which could arise secondarily to the cataract, as lens induced uveitis or as a phacomorphic glaucoma where the enlarged cataractous lens pushes the angle closed as seen on this ultrasound picture. Again the owner says the dog doesn’t seem concerned and she refuses any treatment to reduce the intraocular pressure (42mmHg) which does rather make one wonder why she came to see you in the first place!