Our expert says:
I think that it maybe a good idea to take your dog to the vet for a health check-up and optical examination. With the optical examination the vet may be able to identify if there is an underlying pathology that can account for the observations noted.
Common conditions may include:
Corneal endothelial degeneration
Lens luxation with secondary glaucoma
Progressive retinal degeneration
Sudden acquired retinal degeneration
Neoplasia of the optic chiasma
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