https://www.youtube.com/watch?v=-7gxiKeOAss  

http://en.wikipedia.org/wiki/Christine_Ha                 

http://www.laweekly.com/restaurants/q-and-a-with-christine-ha-cooking-blind-winning-masterchef-her-new-project-289362

http://www.ew.com/article/2012/06/21/masterchef-christine-ha-blind

http://abcnews.go.com/Entertainment/masterchef-finale-blind-chef-christine-ha-wins-season/story?id=17210282

http://www.theblindcook.com/

http://www.reddit.com/r/IAmA/comments/1dz11f/i_am_christine_ha_masterchef_season_3_winner_ask

http://www.christineha.com/

https://www.linkedin.com/pub/christine-ha/3a/a7a/777

http://christinehamasterchef.weebly.com/

http://www.hksb.org.hk/en/ 

http://www.dialogue-experience.com.hk/web/index.php

http://en.wikipedia.org/wiki/Visual_impairment

http://www.hkbu.org.hk/en_knowledge1.php 

http://www.hkbu.org.hk/en_index.php

http://www.ebenezer.org.hk/ebenezer/Eng/index.aspx

http://phys.org/news/2015-02-smart-cameras-visually-impaired.html

http://www.scmp.com/lifestyle/technology/article/1351029/smart-glasses-may-be-newest-aid-visually-impaired

http://kidshealth.org/teen/diseases_conditions/sight/visual_impairment.html

http://philadelphia.cbslocal.com/2015/02/01/free-device-helps-blind-visually-impaired-handle-money/ 

http://tech.co/new-tech-changing-life-visually-impaired-2015-01

http://epaper.chinadailyasia.com/focus-hk/article-372.html

http://www.news-medical.net/health/What-is-visual-impairment.aspx

http://www.who.int/mediacentre/factsheets/fs282/en/

http://www.who.int/mediacentre/news/releases/2003/pr73/en/

http://www.who.int/bulletin/volumes/86/8/08-053652/en/

http://search.who.int/search?q=Blind&ie=utf8&site=who&client=_en_r&proxystylesheet=_en_r&output=xml_no_dtd&oe=utf8&getfields=doctype

http://www.cviga.org/  

http://www.asb.org/learn.html

http://www.healthline.com/symptom/blindness

http://www.tsbvi.edu/infants/134-infants/3293-the-impact-of-visual-impairment-on-development

http://kidshealth.org/teen/diseases_conditions/sight/visual_impairment.html

http://www.scmp.com/magazines/post-magazine/article/1694012/world-blind-union-campaigns-access-digital-world    

http://www.ebenezer.org.hk/ebenezer/Eng/index.aspx