eyelash extension glue is permanent or carbonated or without gas,so this eyelash glue has a special and professional use and can be used only by experts who have been trained to do eyelash implants. ordinary people increase the risk of eye damage due to lack of skills.adhesives should not contain formaldehyde. non-standard,formaldehyde-containing adhesives may damage the eyes and surrounding skin.excessive use of glue makes the lashes heavier and this causes them to fall out sooner.in addition,it increases the possibility of allergies.inattention to eyelashes can cause many problems. for example,a person's eyelashes may stick together