Fig. 1.

Measurement of spatial and morphologic features of lenses using swept-source optical coherence tomography (SS-OCT). (A) The SS-OCT measurements were performed in 8 scanning directions with 22.5° as the interval. (B) A complete lens shape was fitted by software built in instrument. Lens vault (LV, yellow line) was defined as vertical distance from the anterior lens vertex to the line connecting the scleral spurs. Iris-to-lens distance (ILD, white line) was defined as the vertical distance from the anterior lens vertex to the line connecting iris roots. Radii of curvature of anterior surface (Ra, red line) and posterior surface (Rp, green line) were measured by built-in software automatically. Lens diameter (LD, orange line) was defined as the length of line connecting the intersections of anterior and posterior curvatures on both sides. Lens thickness (LT, blue line) was defined as the length of line connecting the anterior and posterior lens vertex. Anterior LT (upper brown line) was defined as the distance from anterior lens vertex to the diameter line, and posterior LT (lower brown line) was calculated as LT minus anterior LT