Information about Lash extension patch testing:
Cyanoacrylate is the main ingredient in lash extension adhesive and also the reason for most reactions It is an irritant for your skin, eyeballs and respiratory functions. For this reason, lash adhesives shouldn't touch the skin.
Patch testing on the skin is an outdated method and is not a clear indication for showing if a reaction will occur or not. Applying a few lashes does not give a clear indication of a reaction because of 2 reasons:
- A patch test does not give full exposure in the same way a full set of lashes will.
- Lash adhesive allergies are cumulative, meaning they build up over time.
It is unlikely (although it is possible) that you will already have an allergy to Cyanoacrylate if you have not been exposed to it before.
Note: nail glue and super glue are Cynoacrylate based.This means that a patch test will not accurately test for allergies and a reaction could still occur even if the patch test results are fine.
Unfortunately, if you become allergic to Cyanoacrylate, it will be recommended that you do not have last extensions and alternative treatments may be discussed.