Symptom Information: Sort according to HPO 

	Symptom Information	Symptom	Abundance	Frequency	Pubmed	Source	DB Freq
1	(HPO:0000572)	Visual loss	10/10 [HPO:probinson]		21310915	IBIS	272 / 7739
2	(HPO:0000639)	Nystagmus	10/10 [HPO:probinson]		21310915	IBIS	555 / 7739
3	(HPO:0000662)	Nyctalopia	2/8 [HPO:probinson]		21310915	IBIS	92 / 7739
4	(HPO:0001133)	Constriction of peripheral visual field			21310915	IBIS	33 / 7739
5	(HPO:0000007)	Autosomal recessive inheritance					2538 / 7739