Iris sphincter dysplasia
Also known as: Iris sphincter muscle dysplasia · Congenital iris sphincter dysplasia · Irisdysplasie · Pupillary sphincter dysplasia
Overview
What it is
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.
How it presents
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.
Treatment
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.
How it's tested
ECVO Augenuntersuchung (DOK)(ECVO-DOK)
Primary testEye examAugenuntersuchung durch ECVO-zertifizierten Augentierarzt (Dortmunder Kreis). Erkennt PRA, Katarakt, Entropium, CEA, MPP, RD u.a.
Issuing body: ECVO
Result scheme: Eye-ECVO
Affected breeds
Treatment cost
Estimated range of typical treatment cost. Actual cost depends on severity, clinic and region.
Frequently asked
What is Iris 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.
How is Iris sphincter dysplasia tested?
Tests currently in our database: ECVO Augenuntersuchung (DOK).
Which breeds are most affected?
This condition isn't tied to a specific breed in our database.