Replied by Ted (Bangkok, Thailand) on 06/16/2012
You can buy the supplements from MBK shopping center, in stalls that have vitamins and supplements. Myopia is caused by vitamin D deficiency, eating too much sweets, chromium and chocolates (source of cadmium). That's the major cause, there are some others, such as glutamic acid toxicity due to not taking sufficient taurine, which is found in sardines.
Ted
