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Influence of tilt and decentration of scleral-sutured intraocular lens on ocular higher-order wavefront aberration
  1. T Oshika1,
  2. G Sugita2,
  3. K Miyata3,
  4. T Tokunaga3,
  5. T Samejima3,
  6. C Okamoto1,
  7. Y Ishii1
  1. 1Department of Ophthalmology, Institute of Clinical Medicine, University of Tsukuba, Ibaraki, Japan
  2. 2Sugita Eye Hospital, Aichi, Japan
  3. 3Miyata Eye Hospital, Miyazaki, Japan
  1. Correspondence to: T Oshika Department of Ophthalmology, Institute of Clinical Medicine, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8575 Japan;toshika{at}md.tsukuba.ac.jp

Abstract

Aim: To investigate the influence of tilt and decentration of scleral-sutured intraocular lenses (IOLs) on ocular higher-order wavefront aberrations.

Methods: In 45 eyes of 36 patients who had undergone scleral suture fixation of posterior chamber IOL, tilt and decentration of IOLs were determined by Scheimpflug videophotography, and higher-order aberration for a 4-mm pupil was measured using the Hartmann–Shack aberrometer. In another 100 eyes of 100 patients after standard cataract surgery with posterior chamber IOL implantation, ocular higher-order aberration was measured.

Results: In eyes with scleral-sutured IOL, the mean (SD) tilt angle and decentration were 4.43° (3.02°) and 0.279 (0.162) mm, respectively. Ocular coma-like aberration in the sutured IOL group was 0.324 (0.170) µm, which was significantly greater than that of the standard cataract surgery group (0.169 (0.061) µm, p<0.001, Student’s t test). No significant difference was found in ocular spherical-like aberration between the sutured IOL group (0.142 (0.065) µm) and standard surgery group (0.126 (0.033) µm; p = 0.254). In the sutured IOL group, IOL tilt significantly correlated with ocular coma-like aberration (Pearson’s correlation coefficient r = 0.628, p<0.001), but no significant correlation was found between IOL tilt and ocular spherical-like aberration (r = 0.222, p = 0.175). The IOL tilt did not correlate with corneal coma-like (r = 0.289, p = 0.171) and spherical-like (r = 0.150, p = 0.356) aberrations. The IOL decentration did not correlate with any higher-order aberrations.

Conclusion: In eyes with scleral-sutured posterior chamber IOL, tilting of the lens induces considerable amount of ocular coma-like aberrations.

  • IOL, intraocular lens

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Footnotes

  • Published Online First 16 August 2006

  • Funding: This study was supported in part by grants-in-aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology, Japan.

  • Competing interests: None.

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