Tesoo surgical lenses is a single thin and flat structure with multiple waveguides (looks like tiny pillars) arranged in a specific pattern. The sensor size of surgical lenses is 1/2.7'' to 1/9''. TTL: 2.7-8.47mm. EFL: 1.03-4.80mm. F.NO: 2.6/4.0/5.7. MBFL: 0.55-1.99mm. Get surgical lenses price now!