Are there any side effects of hair transplant/bad effect on brain or eyes?

This is elective procedure and it is done to benefit you. Any cosmetic procedure is done to benefit you practically without any side effects.

Hair transplant has no bad effects on the brain, eyes and memory, because the procedure is related/limited to only skin of head much superficial to the bone.

Please note that this claim is true when hair transplant is done in certified centers by qualified team (dermatologist or plastic surgeon and his team).