What is the fine-grained topic of the following text: METHODS: Patients who had phacoemulsification with implantation of various types of monofocal intra-ocular lenses (IOL) were examined under mydriasis for glistenings with the following 3 methods: subjective quantification with a rating scale during slitlamp examination, manual counting in slitlamp photographs, and using a purpose-written digital-image processing program for automatic counting of glistenings in Scheimpflug images. Only return the topic.
Examining glistenings in intra-ocular lenses post phacoemulsification using various methods.