Congenital stationary night blindness (CSNB), LRIT3-related(CSNB)
Congenital Stationary Night Blindness LRIT3-related · CSNB LRIT3 · LRIT3-associated congenital stationary night blindness · LRIT3-CSNB · Congenital stationary night blindness type 2 · Night blindness, congenital stationary, LRIT3-related
What it is
This is a congenital (present from birth) and stationary (non-progressive) disorder of the retina, which is the light-sensitive tissue at the back of the eye. It is caused by a genetic defect that disrupts how rod cells, the photoreceptors responsible for low-light vision, transmit signals to the brain. Because of this communication breakdown, the eye cannot properly process visual information in dim environments.
How it presents
Symptoms are typically noticeable starting in puppyhood, with affected dogs showing hesitation, insecurity, or disorientation in the dark or at twilight. In normal daylight conditions, their vision and behavior are completely normal.
Treatment
While this condition is lifelong and incurable, it does not worsen over time and requires no major medical intervention. Management primarily involves simple lifestyle adjustments like improved lighting, with expected lifetime costs ranging from 150 to 600 EUR.
How it's tested
Affected breeds
Treatment cost
Estimated range of typical treatment cost. Actual cost depends on severity, clinic and region.