Research Article

Anterior Lens Curvature Matters in the Course of Primary Angle Closure: An Analysis Based on Ultrasound Biomicroscopic Imaging

Figure 1

Fitted circle overlapped with the anterior lens surface on an APAC eye (a) and a normal eye (b) using the least-squares curve fitting method. Arrows point to the scleral spurs. The two imaginary blue lines help determine the center of anterior lens surface. The green curve is the 3 mm length of anterior lens surface for curve fitting. The red circle fits the green curve and the radius of the circle represents the radius of anterior lens curvature.
(a)
(b)