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Postoperative astigmatic outcomes based on the haptic axis of intraocular lenses inserted in cataract surgery.

AbstractPURPOSE:
This study was conducted to compare post-operative astigmatic outcomes of two groups, with-the-rule (WTR) and against-the-rule (ATR) astigmatism patients, according to the haptic axis of intraocular lenses (IOLs) inserted in cataract surgery.
METHODS:
Seventy-two eyes with WTR astigmatism and 79 eyes with ATR astigmatism had cataract surgery through a clear corneal temporal incision. These two groups of eyes were then each divided into 2 groups based on whether the haptic axis of the inserted IOL was at 180° or 90°. For ATR patients, the outcomes were analyzed according to the three types of IOLs.
RESULTS:
There was no difference in corneal astigmatism, but WTR patients with a 180° haptic axis of the inserted IOL and ATR patients with a 90° hepatic axis of the inserted IOL had a significant decrease in postoperative refractive astigmatism (p < 0.05). The changes in ATR astigmatism according to the IOL type were more effective in single-piece acrylic IOLs than in the three-piece polymethylmethacrylate haptic IOL group.
CONCLUSIONS:
Insertion of the IOL at the 180° haptic axis in WTR patients and at 90° in ATR patients during cataract surgery may have an effect in reducing pre-existing astigmatism. This observed effect was not consistent among the different types of IOLs.
AuthorsIn-Tae Kim, Hae-Young Lopilly Park, Hyun-Seung Kim
JournalKorean journal of ophthalmology : KJO (Korean J Ophthalmol) Vol. 25 Issue 1 Pg. 22-8 (Feb 2011) ISSN: 2092-9382 [Electronic] Korea (South)
PMID21350690 (Publication Type: Comparative Study, Journal Article)
Topics
  • Astigmatism (classification, etiology, physiopathology)
  • Cataract Extraction (adverse effects)
  • Equipment Design
  • Humans
  • Lens Implantation, Intraocular (methods)
  • Lenses, Intraocular
  • Postoperative Complications
  • Treatment Outcome

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