 Detailed ophthalmological examinations of all subjects were performed prior to Nd: YAG laser posterior capsulotomy intervention. Best-corrected visual acuity BCVA was evaluated and converted from Snellen to logarithm of the minimum angle of resolution logMAR units for easiness in statistical analysis. Intraocular pressure IOP was measured by using Goldmann applanation tonometer AT900, the Haag-Streit Diagnostics, Essex, England. Biomicroscopic and fundus findings by using SuperField NC non-contact slit lamp lens, Volk optical, OH, USA, and gonioscopy by using Volk G-4 Four-mirror glass gonio lens, OH, USA of patients were examined by using slit lamp biomicroscopy SL-D701 slit-lamp biomicroscope, Topcon, Tokyo, Japan. Anterior chamber parameters of cases with PCO were measured by using anterior segment module of optical coherence tomography OCT The Spectralis, Heidelberg Engineering, Baden-Württemberg, Germany. Measurements of IOP and anterior chamber parameters, visual acuity and gonioscopy examinations were performed before pupil dilatation; then, at least 7 mm pupil dilatation was achieved using 1 tropicamide and 2.5 phenylephrine eye drops at ten-minute intervals. Slit-lamp and fundus examinations, and measurements of central macular thickness CMT, choroidal thicknesses CTs and MPOD were performed after maximal pupil dilatation. According to biomicroscopic examination 3 ophthalmologists with consensus agreed Nd: YAG laser posterior capsulotomy requirement for each case with PCO. 