title: Prospective study comparing hydrogel with PMMA lens implants.
abstract: A prospective study has been undertaken to assess the relative merits of one-piece polymethylmethacrylate (PMMA) and poly 2 hydroxyethylmethacrylate "hydrogel" (P-HEMA) lenses in uncomplicated eyes after uncomplicated surgery. Two groups of 125 eyes each were matched in terms of patient age and sex. One group received PMMA lenses; the other group received P-HEMA lenses. Six months after surgery the visual acuity of 42% of eyes with P-HEMA lenses was 20/15, whereas that of 29% of eyes with PMMA lenses was 20/15 (p = 0.02). Major decentration occurred in two cases of P-HEMA lens implantation, but asymptomatic subclinical decentration was more common with PMMA lenses (p less than 0.001). The looped PMMA lens was considered adaptable to a wider variety of surgical conditions.
authors.affiliation: Scarborough Hospital Department of Ophthalmology, UK.
authors.forename: P
authors.initials: P
authors.lastname: Percival
mesh_terms: D000179:Acrylates; D000368:Aged; D002924:Ciliary Body / Q000473:pathology; D005260:Female; D006801:Humans; D007429:Intraocular Pressure; D007498:Iris / Q000473:pathology; D007903:Lens Capsule, Crystalline / Q000473:pathology; D007910:Lenses, Intraocular; D008297:Male; D008689:Methacrylates; D008768:Methylmethacrylates; D008875:Middle Aged; D011446:Prospective Studies; D014606:Uveitis, Anterior / Q000150:complications; D014792:Visual Acuity
chemical_list: D000179:Acrylates; D008689:Methacrylates; D008768:Methylmethacrylates; C005044:hydroxyethyl methacrylate