[Comparison of preoperative target ametropia and postoperative refraction for three types of lenses and intra-ocular differences (one pliable acrylic, one pliable PMMA-copolymer and one non-pliable PMMA) ].
In this retrospective study we compared the preoperative target ametropia, calculated with the SRK-T formula, with the postoperative refraction after extracapsular extraction by phacoemulsification and implantation of different posterior chamber lenses. The results show, for all 3 types of lenses, a postoperative refraction stability after the first month. According to our criteria, after 6 month, we have respectively for the non foldable PMMA lens, the PMMA-copolymere foldable and the acrylic foldable lens: 78%, 72% and 78% of good results; 13%, 28% and 9% of mild results and 9%, 0% and 13% of bad results. According to our criteria, the acrylic foldable lens has a tendency to move slightly backwards and the foldable PMMA-copolymere lens to move slightly frontwards. The non foldable lens gives pretty good results, however it is difficult to compare this lens with the 2 other lenses because of the large size of the incision.
Hubaille
C
C
Service d'Ophtalmologie, U.Z. Antwerpen Wilrijkstraat, 10, B-2650 Edegem.
De Groot
V
V
Tassignon
M J
MJ
D002386:Cataract / Q000150:complications; D002387:Cataract Extraction / Q000009:adverse effects; D005500:Follow-Up Studies; D006801:Humans; D019654:Lens Implantation, Intraocular / Q000009:adverse effects; D018918:Phacoemulsification; D019904:Polymethyl Methacrylate; D011184:Postoperative Period; D011474:Prosthesis Design; D012030:Refractive Errors / Q000145:classification* / Q000209:etiology; D012189:Retrospective Studies
D019904:Polymethyl Methacrylate