The Three F’s of Eyewear Design – Form – Fit – Function
1] Form – Eyewear is designed in 3 dimensions: Length – Width – Height
2] Fit – The drape, shape and visual appearance of a 3D object on a human being.
3] Function – The purpose of eyewear is to improve visual acuity, protect the eyes and enhance visual aesthetics. These factors are subjective and unique to each wearer.