I knew about the water treatment but not about the non removal of contact lenses.
...."Acid is corrosive and can cause immense pain when it comes into contact with skin so you must act quickly.
However you can't help anyone if you get hurt yourself, so make sure to secure the area.
Next, look after the victim. Water is the best thing to combat the effects of acid.
Get as much water as you can and douse the victim in it for at least 20 minutes and try to remove any contaminated clothing.
"Water is the best thing"
If the acid is in the person's eyes make sure you run cold water on them for at least 10 minutes.
Don't let the person touch their eyes and definitely do not take out contact lenses.
Also make sure you remove contaminated clothes (if you can) to prevent further harm."....
http://www.kentlive.news/this-is-how-you-can-help-someone-who-is-the-victim-of-an-acid-attack/story-30441988-detail/story.html