title: Study on the surface properties of surface modified silicone intraocular lenses.
abstract: OBJECTIVE
  To prepare a new-type soft intraocular lens (IOL) that silicone intraocular lenses (IOLs) were modified by surface modification technique to assess IOLs biocompatibility.
  
  
  METHODS
  With the technique of ion beam combined with low temperature and low pressure plasma, the surface characteristics of the IOLs including physical and optical properties were determined by the instruments of IOLs resolution, UV/VIS scanning spectrophotometer, contact angle measurement system, electron spectroscopy for chemical analysis (ESCA) and scanning electron microscope (SEM).
  
  
  RESULTS
  The color of titanium (Ti) modified IOLs was light yellow and that of titanium nitride (TiN) modified IOLs was light brown. The absorptive degree of ultraviolet rays and the hydrophilicity of the surfaces of modified IOLs were increased, and appeared suitable chemical compositions. The resolution of unmodified and modified IOLs reached normal standard. The surfaces of unmodified and Ti-modified IOLs appeared uniform. The surfaces of TiN-modified IOLs presented fine porcelain structure.
  
  
  CONCLUSIONS
  The optical properties of all IOLs and the surface morphology of the modified IOLs were not affected by modification processes. The surface properties of the modified IOLs were improved.
authors.affiliation: Department of Ophthalmology, the Naval General Hospital, Beijing 100048, China.
authors.forename: Gui-Qin
authors.initials: GQ
authors.lastname: Wang
authors.forename: Han-Qing
authors.initials: HQ
authors.lastname: Gu
authors.forename: Xiu-Jun
authors.initials: XJ
authors.lastname: Peng