RT Journal Article SR Electronic T1 Strengths, challenges and opportunities of implementing primary eye care in Nigeria JF BMJ Global Health FD BMJ Publishing Group Ltd SP e000846 DO 10.1136/bmjgh-2018-000846 VO 3 IS 6 A1 Ada E Aghaji A1 Claire Gilbert A1 Nnenna Ihebuzor A1 Hannah Faal YR 2018 UL http://gh.bmj.com/content/3/6/e000846.abstract AB