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

Medienart:

Artikel

Erscheinungsjahr:

2000

Erschienen:

2000

Enthalten in:

Zur Gesamtaufnahme - volume:26

Enthalten in:

Journal of cataract and refractive surgery - 26(2000), 1 vom: 15. Jan., Seite 79-82

Sprache:

Englisch

Beteiligte Personen:

Sekundo, W [VerfasserIn]
Böker, T [VerfasserIn]
Fimmers, R [VerfasserIn]

Themen:

9011-14-7
Biocompatible Materials
Comparative Study
Journal Article
Polymethyl Methacrylate

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

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM10575109X