If it sounds like it's all too good to be true, it may be, at least for some folks. Healthline warns that because chemicals are involved, people with sensitive skin need to think more than twice before getting the procedure done. If you decide to go ahead with the procedure, seek out an expert who is well known, and who you can trust. The risk of having something go wrong is increased when you work with an inexperienced beautician, so paying a bit more to get the perm done is worth the extra.
Healthline also cautions that because the chemicals do leave your lashes more brittle, they could get damaged, which could also leading to (temporary) bald eyelids. Perhaps the factor which might give you the most pause is that even if it all goes well, the procedure is likely to leave you with shorter-looking lashes. So unless you have long, straight lashes and have few to no skin sensitivities, it sounds like putting up with the daily use of a lengthening mascara and lash curler could be a more sensible option. Plus, it'll save you around $70 per perm.