_:vb50949537 . _:vb50949537 . _:vb50949537 "An eye disease characterized by a lack or loss of vision."^^ . _:vb50949537 . _:vb50949537 . _:vb50949537 "url:https://nei.nih.gov/eyedata/blind"^^ . _:vb50949537 "url:https://www.cdc.gov/healthcommunication/toolstemplates/entertainmented/tips/Blindness.html"^^ . _:vb50949537 "url:https://en.wikipedia.org/wiki/Visual_impairment"^^ . _:vb50949537 . _:vb50949537 .