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Several eye diseases occur in dogs.
The main ones are:
* Retinal degeneration or Progressive Retina Atrophy (PRA). A group of retinal defects that occurs in many breeds and leads to blindness.
* Cataract (congenital). This is congenital grey cataract. the lens are cloudy. Cataract can occur in one eye or both eyes. Distinction from the well-known blue haze in older dogs (a normal ageing process) is usually easy to make.
* Retina Dysplasia (RD). This is a congenital retinal anomaly.
* Collie Eye Anomaly. It is a congenital anomaly that may involve the retina, choroid and optic nerve.
* Ligamentum pectinatum abnormality (Goniodysplasia). A congenital abnormality of the drainage of ocular fluid. A proportion of dogs with this abnormality develop high eye pressure (glaucoma) Entropion. This is an abnormality in which an eyelid (usually the lower eyelid) turns inwards.
* Distichiasis/Ectopic Cilia. This is abnormal hair growth in the eyelid margin, among others.
* (Primary) Lens luxation. This is the detachment of the lens. A lens detachment can cause an increase in pressure (glaucoma) in the eye, leading to blindness.
Occasionally eye diseases occur in kelpies but comparatively not a lot. The breeding regulations of the Australian Kelpie Association state that eye diseases must be tested before breeding is allowed. This is not common in many other countries.