This document discusses stages of senile cataract, lens induced glaucomas, and pre-operative assessment of cataract. It outlines the stages of cortical cataract and describes lens induced glaucomas including phacomorphic glaucoma, phacotopic glaucoma, and phacolytic glaucoma. It also lists the steps for pre-operative evaluation of a patient for cataract surgery, which includes assessing visual acuity, intraocular pressure, lens status, and performing tests like A-scan and K readings to determine IOL power for surgery.