Symptom Information: Sort according to HPO 

	Symptom Information	Symptom	Abundance	Frequency	Pubmed	Source	DB Freq
1	(HPO:0000505)	Visual impairment					297 / 7739
2	(HPO:0000548)	Cone/cone-rod dystrophy					47 / 7739
3	(HPO:0000551)	Abnormality of color vision					20 / 7739
4	(HPO:0000639)	Nystagmus	rare [HPO:skoehler]				555 / 7739
5	(HPO:0001133)	Constriction of peripheral visual field					33 / 7739
6	(HPO:0007663)	Reduced visual acuity					100 / 7739