Iris sphincter muscle dysplasia · Congenital iris sphincter dysplasia · Irisdysplasie · Pupillary sphincter dysplasia
This is a congenital eye condition affecting the iris, which is the colored part of the dog's eye. It involves a malformation of the sphincter muscle, the specific muscle responsible for narrowing the pupil. Because this muscle does not develop properly, the pupil cannot constrict normally to limit the amount of light entering the eye.
Owners typically notice this condition in young puppies, as the affected dog's pupils remain unusually dilated even in bright environments. Dogs with this dysplasia will often squint, blink excessively, or show discomfort when exposed to direct sunlight.
While the condition is lifelong and cannot be cured, it rarely impacts a dog's overall quality of life. Management is simple and involves avoiding bright sunlight or using protective dog sunglasses, with diagnostic and monitoring costs typically ranging from 100 to 500 EUR.
More conditions affecting the Eyes.
Estimated range of typical treatment cost. Actual cost depends on severity, clinic and region.