Accurate determination of effective lens position and lens-capsule distance with 4 intraocular lenses

J Cataract Refract Surg. 1998 Aug;24(8):1094-8. doi: 10.1016/s0886-3350(98)80103-x.


Purpose: To measure effective lens position (ELP) of 4 intraocular lenses (IOLs) using high precision and high resolution dual-beam partial coherence interferometry (PCI) and to assess the tendency of these IOLs to produce a lens-capsule distance (LCD), a possible risk factor for posterior capsule opacification.

Setting: Department of Ophthalmology, Vienna General Hospital; Institute of Medical Physics, University of Vienna, Austria.

Methods: In a retrospective study, PCI was used to measure ELP and LCD in 139 pseudophakic eyes of 110 patients with 4 IOLs: acrylic 3-piece IOL (AcrySof MA60BM); silicone 3-piece IOL without a capsular tension ring (PhacoFlex SI30) and with a capsular tension ring (PhacoFlex SI30 and Morcher Type 14); silicone plate-haptic IOL (Staar AA4203VF); and a hydrogel plate-haptic IOL (logel 1103).

Results: The ELP and LCD were determined with a precision of approximately 3 to 4 microns. An LCD was detected in 21% eyes with the AcrySof, 20% of eyes with the SI30 without a capsular tension ring, 10% of eyes with a capsular tension ring, 21% of eyes with the Staar, and 17% of eyes with the logel. The LCDs detected by PCI, but not by slitlamp examination, were significantly smaller than those detected by both.

Conclusion: The amount of LCD detected by PCI was approximately the same with all IOL types (approximately 20%) except the PhacoFlex SI30 with a capsular tension ring (10%).

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Acrylates
  • Adult
  • Aged
  • Aged, 80 and over
  • Biometry / methods*
  • Eye / anatomy & histology
  • Humans
  • Interferometry
  • Lens Capsule, Crystalline / anatomy & histology*
  • Lenses, Intraocular*
  • Light
  • Middle Aged
  • Polyhydroxyethyl Methacrylate
  • Pseudophakia / complications
  • Retrospective Studies
  • Silicone Elastomers


  • Acrylates
  • Silicone Elastomers
  • Polyhydroxyethyl Methacrylate