Congenital Stationary Night Blindness


CSNB causes blindness at night, but normal vision during the day time hours. This is a non-progressive disease, meaning that vision will not worsen over time.

  • Signs and symptoms

    Puppies with night blindness often appear normal during the day, but will run into walls and other objects at night.

    Signs first develop in young dogs.

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  • Diagnosis

    Veterinary Ophthalmologists can perform specialized diagnostics to confirm a diagnosis of CSNB.

  • Treatment

    Currently, there is no treatment for night blindness.

  • What to do if your dog is at risk


    • Keeping lights on at night to help your dog navigate is one of the best things you can do at home.

  • Genetic Information

    This mutation was first described in the Beagle.

    This mutation is inherited in an autosomal recessive manner; that is, a dog requires two copies of the mutation to show signs of the disease.

    Gene names:

    LRIT3 ‐ chr

    Inheritance type:



    Das et al 2019

  • Breeds affected

    This health condition affects the following breeds

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