Catalog

Congenital stationary night blindness

No MMS code

Link to WHO Definition

Congenital stationary night blindness – http://id.who.int/icd/entity/587494652

This is a rare X-linked non-progressive retinal disorder. It has two forms, complete, also known as type-1 (CSNB1), and incomplete, also known as type-2 (CSNB2), depending on severity. In the complete form (CSNB1), there is no measurable rod cell response to light, whereas this response is measurable in the incomplete form.