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

Kim IT, Park HY, Kim HS - Korean J Ophthalmol (2011)

Bottom Line: 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°.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).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.

View Article: PubMed Central - PubMed

Affiliation: Department of Ophthalmology and Visual Science, Yeouido St. Mary's Hospital, The Catholic University of Korea School of Medicine, Seoul, Korea.

ABSTRACT

Purpose: 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.

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Related in: MedlinePlus

The changes in mean astigmatism by intraocular lens (IOL) axis insertion. In the with-the-rule (WTR) astigmatism group by refraction (A), topography measurement (B), and in the against-the-rule (ATR) astigmatism group by refraction measurement (C), and topography measurement (D) (*p <0.05 indicates p-value compared with the preoperative values).D=diopters.
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Figure 2: The changes in mean astigmatism by intraocular lens (IOL) axis insertion. In the with-the-rule (WTR) astigmatism group by refraction (A), topography measurement (B), and in the against-the-rule (ATR) astigmatism group by refraction measurement (C), and topography measurement (D) (*p <0.05 indicates p-value compared with the preoperative values).D=diopters.

Mentions: Comparing these two groups, refractive astigmatism was significantly lower in group 1 than group 2 1 week, 1 month, and 2 months after the operation (p = 0.051, 0.050, and 0.048, respectively). The mean corneal astigmatism in the 2 groups showed a slight increase. In group 2, a statistically significant increase of corneal astigmatism 1 week, 1 month, and 2 months after the operation was observed (statistically significant values are indicated as * in the figure). However, there were no significant differences in post-operative corneal astigmatism between the 2 groups, except at 2 months post-operatively (p = 0.321, 0.129, 0.585, and 0.050, respectively) (Fig. 2A and 2B).


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

Kim IT, Park HY, Kim HS - Korean J Ophthalmol (2011)

The changes in mean astigmatism by intraocular lens (IOL) axis insertion. In the with-the-rule (WTR) astigmatism group by refraction (A), topography measurement (B), and in the against-the-rule (ATR) astigmatism group by refraction measurement (C), and topography measurement (D) (*p <0.05 indicates p-value compared with the preoperative values).D=diopters.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3039190&req=5

Figure 2: The changes in mean astigmatism by intraocular lens (IOL) axis insertion. In the with-the-rule (WTR) astigmatism group by refraction (A), topography measurement (B), and in the against-the-rule (ATR) astigmatism group by refraction measurement (C), and topography measurement (D) (*p <0.05 indicates p-value compared with the preoperative values).D=diopters.
Mentions: Comparing these two groups, refractive astigmatism was significantly lower in group 1 than group 2 1 week, 1 month, and 2 months after the operation (p = 0.051, 0.050, and 0.048, respectively). The mean corneal astigmatism in the 2 groups showed a slight increase. In group 2, a statistically significant increase of corneal astigmatism 1 week, 1 month, and 2 months after the operation was observed (statistically significant values are indicated as * in the figure). However, there were no significant differences in post-operative corneal astigmatism between the 2 groups, except at 2 months post-operatively (p = 0.321, 0.129, 0.585, and 0.050, respectively) (Fig. 2A and 2B).

Bottom Line: 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°.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).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.

View Article: PubMed Central - PubMed

Affiliation: Department of Ophthalmology and Visual Science, Yeouido St. Mary's Hospital, The Catholic University of Korea School of Medicine, Seoul, Korea.

ABSTRACT

Purpose: 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.

Show MeSH
Related in: MedlinePlus