About the meaning of 'look like they do.'

H, I teachers~

I am not here to bother you with this long part of an article.

I just don't understand the meaning of 'to look like they do' part at the end.

I am wondering what 'DO' is meaning.

Thanks in advance~

Cosmetic surgeons in the USA are reporting a disturbing increase in the number of patients seeking and having facial procedures to look like their Snapchat selfies. The surgeons have termed this alarming new trend "Snapchat dysmorphia". This term derives from the condition body dysmorphic disorder - a mental disorder where the sufferer is obsessed with the idea that part of their body or appearance is severely flawed and in need of drastic measures to fix it. The surgeons described the condition in the journal Facial Plastic Surgery. They wrote that 55 per cent of plastic surgeons reported an increase in the number of patients wanting alterations to their face to look like they do after using Snapchat filters.