Copyright and Disclaimer

© International Centre for Eye Health, London.

The Community Eye Health Journal is an Open Access publication. Articles are distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Acknowledgements should be made to the author(s) and to Community Eye Health Journal. All graphics by Victoria Francis unless stated otherwise.

ISSN 0953-6833

The journal is produced in collaboration with the World Health Organization. Signed articles are the responsibility of the named authors alone and do not necessarily reflect the policies of the World Health Organization. The World Health Organization does not warrant that the information contained in this publication is complete and correct and shall not be liable for any damages incurred as a result of its use. The mention of specific companies or of certain manufacturers’ products does not imply that they are endorsed or recommended by the World Health Organization in preference to others of a similar nature that are not mentioned.