Induced corneal astigmatism using an asymmetric corneoscleral tunnel and a large-optic intraocular lens
PURPOSE: To prospectively evaluate the induction of corneal astigmatism using an asymmetric corneoscleral tunnel incision (J-incision) to implant large-optic (7.0 mm) intraocular lenses (IOLs).
SETTING: Department of Ophthalmology, University of Bonn, Germany.
METHODS: Thirty-five patients had sutureless phacoemulsification with implantation of a 7.0 mm poly(methyl methacrylate) posterior chamber IOL using an inverse J-shaped asymmetric tunnel incision. The corneal astigmatism was measured by corneal keratometry and topography preoperatively and 1 day and 1 and 3 months postoperatively. Induced astigmatism was calculated by vector analysis.
RESULTS: Mean induced changes in the corneal radii measured by keratometry were 0.17 mm +/- 0.14 (SD) on the first postoperative day, 0.18 +/- 0.14 mm after 1 month, and 0.17 +/- 0.14 mm after 3 months. Mean postoperative induced astigmatism measured by corneal topography was 1.08 +/- 0.66 diopters (D), 0.89 +/- 0.78 D, and 0.85 +/- 0.70 D, respectively. No signs of wound instability were detected.
CONCLUSION: An asymmetric corneoscleral incision was suitable for implantation of large-optic IOLs, resulting in immediate stability of the induced cylindrical power in the central 3.0 mm zone as measured by keratometry. A reduction in induced corneal astigmatism can be achieved using this technique versus using symmetrical wound constructions and large-optic IOLs.
Errataetall: |
CommentIn: J Cataract Refract Surg. 2000 Nov;26(11):1569-70. - PMID 11185593 |
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Medienart: |
Artikel |
Erscheinungsjahr: |
2000 |
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Erschienen: |
2000 |
Enthalten in: |
Zur Gesamtaufnahme - volume:26 |
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Enthalten in: |
Journal of cataract and refractive surgery - 26(2000), 1 vom: 15. Jan., Seite 79-82 |
Sprache: |
Englisch |
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Beteiligte Personen: |
Sekundo, W [VerfasserIn] |
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Themen: |
9011-14-7 |
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Anmerkungen: |
Date Completed 09.02.2000 Date Revised 22.08.2019 published: Print CommentIn: J Cataract Refract Surg. 2000 Nov;26(11):1569-70. - PMID 11185593 Citation Status MEDLINE |
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Förderinstitution / Projekttitel: |
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PPN (Katalog-ID): |
NLM10575109X |
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245 | 1 | 0 | |a Induced corneal astigmatism using an asymmetric corneoscleral tunnel and a large-optic intraocular lens |
264 | 1 | |c 2000 | |
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500 | |a Date Completed 09.02.2000 | ||
500 | |a Date Revised 22.08.2019 | ||
500 | |a published: Print | ||
500 | |a CommentIn: J Cataract Refract Surg. 2000 Nov;26(11):1569-70. - PMID 11185593 | ||
500 | |a Citation Status MEDLINE | ||
520 | |a PURPOSE: To prospectively evaluate the induction of corneal astigmatism using an asymmetric corneoscleral tunnel incision (J-incision) to implant large-optic (7.0 mm) intraocular lenses (IOLs) | ||
520 | |a SETTING: Department of Ophthalmology, University of Bonn, Germany | ||
520 | |a METHODS: Thirty-five patients had sutureless phacoemulsification with implantation of a 7.0 mm poly(methyl methacrylate) posterior chamber IOL using an inverse J-shaped asymmetric tunnel incision. The corneal astigmatism was measured by corneal keratometry and topography preoperatively and 1 day and 1 and 3 months postoperatively. Induced astigmatism was calculated by vector analysis | ||
520 | |a RESULTS: Mean induced changes in the corneal radii measured by keratometry were 0.17 mm +/- 0.14 (SD) on the first postoperative day, 0.18 +/- 0.14 mm after 1 month, and 0.17 +/- 0.14 mm after 3 months. Mean postoperative induced astigmatism measured by corneal topography was 1.08 +/- 0.66 diopters (D), 0.89 +/- 0.78 D, and 0.85 +/- 0.70 D, respectively. No signs of wound instability were detected | ||
520 | |a CONCLUSION: An asymmetric corneoscleral incision was suitable for implantation of large-optic IOLs, resulting in immediate stability of the induced cylindrical power in the central 3.0 mm zone as measured by keratometry. A reduction in induced corneal astigmatism can be achieved using this technique versus using symmetrical wound constructions and large-optic IOLs | ||
650 | 4 | |a Comparative Study | |
650 | 4 | |a Journal Article | |
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650 | 7 | |a Polymethyl Methacrylate |2 NLM | |
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700 | 1 | |a Böker, T |e verfasserin |4 aut | |
700 | 1 | |a Fimmers, R |e verfasserin |4 aut | |
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