Wa `alaykum As-Salamu wa Rahmatullahi wa Barakatuh

 

There are two general codes in Islam that regulate any beautification changes. It should not change your God given physical appearance nor it should cause harm.

 

Only exempted from that are medical conditions or birth defects.

 

For example, if one was born with very light eye brow or lashes that makes their appearance weird or if one had an accident like burning or such, then yes it can be used to bring it back to normal human appearance.

 

But if the purpose behind it was just mere beautification with no real need for it, I do not see it permissible. Some cleaning of the eyebrow is allowed but not changing shape regardless of methods used.

 

Almighty Allah knows best.