title: Physicochemical surface properties of various intraocular lenses.
abstract: OBJECTIVE
  It is of major interest to understand how intraocular lens (IOL) surfaces interact with aqueous humor or tissues after implantation. Important parameters to describe the physicochemical surface properties are the contact angle and critical surface tension. Therefore, we performed measurements of the contact angle and critical surface tension of several commercially available IOLs.
  
  
  METHODS
  Department of Ophthalmology, Johannes Gutenberg University, Mainz, University Eye Hospital, Tübingen, and Max Planck Institute for Polymer Research, Mainz, Germany.
  
  
  METHODS
  A total of 17 commercially available standard quality IOL types (6 of each) of different materials from several manufacturers were studied. Scanning electron microscopy and contact angle measurements using the sessile drop method were made.
  
  
  RESULTS
  The sessile drop method differentiated all materials based on their surface forces. The contact angle (mean +/- SD) ranged from 56.5 +/- 3.8b 3.
  
  
  CONCLUSIONS
  Contact angles differed between the IOLs depending on the IOL material with the lowest contact angle in the heparin-surface-modified IOL. The contact angle measurement method generates useful information about the material surface and its potential biomaterial interactions.
authors.affiliation: Department of Ophthalmology, Johannes Gutenberg University, Mainz, Germany. bdick@mail.uni-mainz.de
authors.forename: H B
authors.initials: HB
authors.lastname: Dick
authors.forename: A
authors.initials: A
authors.lastname: Frohn
authors.forename: A J
authors.initials: AJ
authors.lastname: Augustin
authors.forename: B
authors.initials: B
authors.lastname: Wolters
authors.forename: T
authors.initials: T
authors.lastname: Pakula
authors.forename: N
authors.initials: N
authors.lastname: Pfeiffer
mesh_terms: D000180:Acrylic Resins; D020099:Coated Materials, Biocompatible; D006493:Heparin; D007910:Lenses, Intraocular; D019904:Polymethyl Methacrylate; D012826:Silicone Elastomers; D013500:Surface Tension
chemical_list: D000180:Acrylic Resins; D020099:Coated Materials, Biocompatible; D012826:Silicone Elastomers; D006493:Heparin; D019904:Polymethyl Methacrylate