Persistent Pupillary Membranes in Dogs

Category: Eye
Breeds documented: 5
Published sources: 9

Overview

Fine strands left over from the eye's development before birth can remain across the pupil, the opening that lets light in. These persistent pupillary membranes usually match the color of the iris, the colored part of the eye. Strands confined to the iris are often harmless. Attachments to the lens or cornea, the clear front surface, can interfere with vision.

Signs to watch for

Fine colored strands crossing the pupil
A cloudy patch where strands attach to the lens or eye surface
Reduced sight in more severe cases

These are developmental remnants that remain beyond early puppyhood, usually after 3 months.

When to get help Book a vet examination if you notice strands, cloudy patches, or reduced sight.

Diagnosis and tests

A vet or veterinary eye specialist examines the pupil and the places where any strands attach. A magnifying eye instrument helps distinguish fine strands from other changes. The examination also checks for cloudy areas on the lens or cornea and records which structures are involved.

Breeds with documented risk

5 breeds

By breed size

1 Small
3 Medium
1 Large

NorrbottenspetsSmall · Miscellaneous Class
Grand Basset Griffon VendéenMedium · Hound Group
Basset Artésien NormandMedium · FCI Group 6 (Scenthounds)
Akita InuMedium · Miscellaneous Class
SarplaninacLarge · FCI Group 2 (Pinscher and Schnauzer - Molossoid and Swiss Mountain and Cattle Dogs)

Inheritance

Not yet known
None of the sources we use states how this is inherited in dogs yet.

We've gathered what published sources say about this condition, so you can talk it through with your vet. It isn't veterinary advice: you and your vet know your dog best.