**Author details**

Claire Chow1,2 and Poemen Pui-man Chan1,2\*

1 Department of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Hong Kong Eye Hospital, Kowloon, Hong Kong, The People's Republic of China

2 Hong Kong Eye Hospital, Hong Kong, SAR, The People's Republic of China

\*Address all correspondence to: poemen@gmail.com

© 2020 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
