ต้อกระจก

http://www.electron.rmutphysics.com/science-news/index.php?option=com_content&task=view&id=874&Itemid=4


http://www.thaiclinic.com/cataract.html

http://www.lasikthai.com/th/treatment/cataract/default.php

http://dr.yutthana.com/cataract.html

http://blog.eduzones.com/winny/3092