Circle lenses?

Charleigh • TTC my first baby with my partner, after unfortunate miscarriage?
Hi everyone, i came across a few girls on youtube wearing circle lenses 
(fashion colour contacts with a larger diameter to make your eyes appear larger and more doll like)
​ i think they are really cute but ive heard that there possibly dangerous, but ive not heard of anyone having problems with them are they just as dangerous as normal contacts?
​If anyone knows anything about these let me know because i was thinking of purchasing a pair!
​Thank you!