He worked with Ohad Fried‚ a research fellow at Stanford University’s computer science department‚ to develop a mathematical model that shows nasal distortion created by photos taken at close range.
The model‚ published in JAMA Facial Plastic Surgery‚ shows that an average selfie‚ taken about 30cm from the face‚ makes the nasal base appear approximately 30% wider and the nasal tip 7% wider than if the photograph had been taken at 150cm‚ a standard portrait distance that provides a more proportional representation of facial features.
The mathematical model is based on the average head and facial feature measurements obtained from a selection of racially and ethnically diverse participants.