title: Optical resolution of silicone and polymethylmethacrylate intraocular lenses.
abstract: The optical resolution and contrast of 18 silicone and 18 polymethylmethacrylate (PMMA) intraocular lenses were determined before implantation in and after removal from rabbit eyes. A specially designed microphotographic system that allows documentation and comparison of the image quality of different lens types was used. Silicone intraocular lenses showed a mean axial resolution of 1.25, PMMA lenses showed 1.60, of an optotype analogous resolution target (1.0 = 20/20) at a 3 mm pupil opening preoperatively. At one to 16 weeks postoperatively, both types of IOLs demonstrated nearly unchanged resolution. Contrast, however, decreased to between 60% and 85% of the preoperative 100% standard. This decrease was due to precipitates deposited on the lens surface, to posterior capsule opacification, and to lens decentration.
authors: First University Eye Clinic, University of Vienna, Austria.
authors: W
authors: W
authors: Kulnig
authors: R
authors: R
authors: Menapace
authors: C
authors: C
authors: Skorpik
authors: M
authors: M
authors: Juchem
mesh_terms: D000818:Animals; D007910:Lenses, Intraocular; D008768:Methylmethacrylates; D008855:Microscopy, Electron, Scanning; D008953:Models, Anatomic; D055095:Optics and Photonics; D011474:Prosthesis Design; D011817:Rabbits; D012828:Silicones; D014792:Visual Acuity
chemical_list: D008768:Methylmethacrylates; D012828:Silicones