Miles is a consultant ophthalmologist and oculoplastic surgeon with a private practice at The London Clinic on Harley Street. He specialises in ophthalmic cosmetic, reconstructive, and lacrimal (tear drainage) surgery.

In addition to his private practice, Miles holds a substantive NHS consultant post at the Royal Free London and he established and runs the oculoplastic service at North Middlesex University Hospital. He also has expertise in cataract and pterygium surgery.

As an honorary clinical lecturer at UCL and assistant professor at St. George's University, Miles is actively involved in training the next generation of ophthalmologists.