The crossword solution for the term 'FAVORIN'' is FER, which is an acronym for 'Familial Exudative Retinopathy'. Familial Exudative Retinopathy is a rare genetic disorder that affects the eyes and can cause vision loss. It is caused by a mutation in the FER gene, which is located on chromosome 11. The disorder is inherited in an autosomal recessive pattern, meaning that both parents must carry the mutated gene in order for their child to be affected. Treatment options for this disorder are limited, but may include laser therapy and/or surgery.