Retinitis pigmentosa

http://www.noah-health.org/en/eye/disorders/retinitispigment.html

r/o Usher Syndrome and Bardet-Biedl Syndrome

Usher: http://www.ushersyndrome.nih.gov/whatis/fulltext.html

Bardet-Biedl Syndrome http://www.ncbi.nlm.nih.gov/bookshelf/br.fcgi?book=gene&part=bbs