Figure 1. The photograph of all grading
lens at the slit lamp (Haag-Streit BQ 900). The grades are as follows:
grade 0, clear; grade 1, clear nuclear with wide sutures; grade 2,
slight dense nuclear with opacities radiating from sutures; grade 3,
dense nuclear without clefts; grade 4, dense nuclear with clefts; grade
5, nuclear cataract with clefts; grade 6, nuclear cataract with dense
radial opacities; and grade 7, nuclear cataract with whole lens
opacities.