Miosis
Also known as: Pupillary constriction · Constricted pupils · Pupillenverengung · Myosis · Congenital miosis
Overview
What it is
Miosis is an eye condition characterized by abnormally small, constricted pupils that do not dilate, or widen, properly. This occurs due to a dysfunction in the muscles of the iris or the nervous system pathways that control pupil movement. It can be congenital, meaning a puppy is born with it, and is routinely assessed during official veterinary eye examinations.
How it presents
Owners will notice that the dog's pupils remain very small even in dim or dark environments. This can cause the dog to struggle to see well in low-light conditions, with signs usually becoming apparent from puppyhood.
Treatment
While mild congenital cases often do not require intensive therapy, symptomatic relief can be managed with pupil-dilating eye drops. Treatment and diagnostic costs typically range from 150 to 1200 EUR depending on the underlying cause.
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 Miosis?
Miosis is an eye condition characterized by abnormally small, constricted pupils that do not dilate, or widen, properly. This occurs due to a dysfunction in the muscles of the iris or the nervous system pathways that control pupil movement. It can be congenital, meaning a puppy is born with it, and is routinely assessed during official veterinary eye examinations.
How is Miosis 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.