Tegan I've read that you need to be careful with that stuff that claims to make your eyelashes grow as certain ingredients can cause eye colour to change permanently
Not all of them have the same ingredients, but it's the ones that contain the stuff used for treating glaucoma. Mumsnet had a discussion a while ago
www.mumsnet.com/Talk/style_and_beauty/a1140860-Eye-lash-serums
Recommendations for a plant identifier app that is free



].
!