AIM: to evaluate the choosing of intraocular lens power for children with congenital cataract and its postoperative influence on the children's refractive change and axial growth.

Power and shutter buttons, a USB port, and a touch-sensitive strip to move the F2 lens through its 8X zoom range are arranged along the sides.

This causes it to polymerise and then change shape, which means the ophthalmologist can tweak the lens to alter its power.