Cataract surgery in cataracta membranacea.

A 27-year-old man with no history of intraocular surgery presented with progressive blurred vision in both eyes. Slitlamp evaluation revealed a white, thin membrane in the pupillary area that resembled posterior capsule opacification. A naturally formed lens was absent. Ultrasound biomicroscopy demonstrated a rarefaction of lens fibers in the equator region with a loss of the normal anatomic lens structure on the left side. Visual acuity was 20/32 with +10.00 -0.75 x 170 in the right eye and 20/100 with +11.50 -0.50 x 25 in the left eye. After capsulotomy and excision of the membranous capsule, an anterior vitrectomy, and implantation of a sulcus-fixed intraocular lens in both eyes, the patient was highly satisfied with the final visual outcome. The patient had stereopsis, which supported his history of good visual function in childhood.