Brittle Cornea Syndrome 1, also known as fragilitas oculi with joint hyperextensibility, is related to brittle cornea syndrome 2 and brittle cornea syndrome, and has symptoms including unspecified visual loss An important gene associated with Brittle Cornea Syndrome 1 is ZNF469 (Zinc Finger Protein 469). The drugs Riboflavin and Folic acid have been mentioned in the context of this disorder. Affiliated tissues include skin and eye.