An experienced Ophthalmic Surgeon, Mr. De Koning has performed many laser procedures including LASIK and LASEK. He is registered with the General Medical Council (GMC) and is a fully trained Ophthalmologist who has undergone additional specialist training in refractive surgery.

He is an Ophthalmic Surgeon for Optical Express who has gained vast experience in a wide range of specialities and is an active member of various affiliated bodies and societies. Twice every year, Mr. De Koning attends International Medical Advisory Board (IMAB) Conferences and is annually assessed by this board. The panel consists of several of the world's most eminent Refractive Surgeons including Mr. Steven Schallhorn, former Head of Ophthalmology for the US Navy, Professor Jan Venter, a world leading Ophthalmic Surgeon, and Mr. Jeffery Machat, co-founder of TLC Vision, one of the largest laser vision correction providers in the world.

Mr. De Koning began his medical career as an Ophthalmologist working within the field of refractive surgery and radial keratotomy in 1983 after graduating from the University of Utrecht and completing his postgraduate qualifications. He progressed to various positions within private laser eye surgery clinics gaining extensive surgical experience specialising in cataract surgery and refractive techniques using the excimer laser. As well as extensive operative experience, he gained vast clinical experience and a keen understanding of each patient's requirements and expectations.

Mr. De Koning has made presentations in many different countries about laser surgery and regularly attends conferences relating to the field of refractive surgery, allowing him to stay abreast of all developments in the advancing field of ophthalmology. He is actively involved in undertaking research projects relating to laser refractive surgery and is a regular lecturer on the teaching circuit.