Symptom Information: Sort according to HPO 

	Symptom Information	Symptom	Abundance	Frequency	Pubmed	Source	DB Freq
1	(HPO:0000543)	Optic disc pallor					67 / 7739
2	(HPO:0000556)	Retinal dystrophy					65 / 7739
3	(HPO:0000613)	Photophobia					158 / 7739
4	(HPO:0000662)	Nyctalopia	rare [HPO:skoehler]				92 / 7739