 Reinstein developed the first method of examining the individual layers of the cornea with micronic precision in 3D with VHF digital ultrasound and initiated the field of studying corneal epithelial dynamics in corneal refractive surgery, now an accepted and much used body of knowledge for the preoperative screening diagnosis of keratoconus and the analysis of the complications of refractive surgery.He has been the lead consultant since 2001 to Carl Zeiss Meditec, for whom he developed Presbyond Laser Blended Vision for treating presbyopia and has contributed to the development of ReLEx SMILE – a new keyhole based corneal laser eye surgery method.Reinstein has appeared on television as the eye laser specialist, including on Extreme Makeover UK, 10 Years Younger (UK), "BBC Breakfast", Sky News, and BBC Radio 4.