I have my eyelashes tinted all the time, they look fantastic. You can also get them permed, which makes it look like you have used a eyelash curler every day without having to do a thing. When you get them permed it also includes a tint.

If you eyes start stinging during the treatment you need to let the therpaist know, they'll remove it and wash it off and then if its not fully developed then it can be reapplied so that its not stinging.

Its not really the therpaists doing if it stings, generally if you squint your eyes tight or try to open them at all the tint can go into the eyes. When you apply the tint you have the edges of the eye covered with special pads and vaseline so the tint doesn't get on the skin.