Canine Multifocal Retinopathy Type 1 is an eye disorder known to affect Coton de Tulears.

 The mutation causes raised lesions on the retina.

The lesions alter the appearance of the eye but usually do not affect sight.

The lesions may disappear, or may result in minor retinal folding.

Symptoms of the mutation usually appear when a puppy is only a few months old, and generally do not worsen over time but can progress very slowly.

 The genetic test for CMR is valuable for identifying the cause of a retinal deformation.

Given the exact genetic diagnosis, the owner can be reassured that there probably will be little or no vision loss due to this condition.