Abstract
Objective: To share our experience in correcting corneal astigmatism in patients undergoing cataract surgery.
Methods: Our study includes 48 eyes, 37 eyes with a corneal astigmatism of up to 2.50 dpt and 11 eyes with a higher (>2.50dpt) astigmatism. The first group was treated with arcuate keratotomies (AK) performed by B&L VICTUS Femtosecond Laser Platform. The AKs were placed on the steepest corneal meridian in a resulting depth of 85% based on the real-time OCT pachymetry. Patients from group 2 were treated with intraocular toric IOLs.
Postsurgical follow-up period was 18 months and includes uncorrected visual acuity, manifest refraction, count and density of endothelial corneal cells prior to and after surgery, pachymetry, corneal topography (Placidobased and Scheimpflug image -derived topography).
Results:
- The mean astigmatismus reduction in the first group was from 1.71 D ± 0.63 (SD) to 0.28 ± 0.39 D (P<.001)
- The mean astigmatismus reduction in the second group was from -3.75 D ± 1.10 (SD) to -0.38 ± 0.51 D (P<.001)
Conclusion: Contemporary methods for correction of corneal astigmatism allows high uncorrected visual acuity in patients undergoing cataract surgery.
Keywords
astigmatis; toric IOLs; arcuate keratotomies
References
Hoffer KJ (1980) Biometry of 7,500 cataractous eyes. Am J Ophthalmol 90:360–368
Armeniades CD, Boriek A, Knolle Jr GE. Effect of incision length, location, and shape on local corneoscleral deformation during cataract surgery. J Cataract Refract Surg. 1990;16(1):83-87.
Samuelson SW, Koch DD, Kuglen CC. Determination of maximal incision length for true small-incision surgery. Ophthalmic Surg. 1991;22(4):204-207.
65. Rückl T, Dexl AK, Bachernegg A, Reischl V, Riha W, Ruckhofer J, Binder PS, Grabner G. Femtosecond laser-assisted intrastromal arcuate keratotomy to reduce corneal astigmatism. J Cataract Refract Surg. 2013;39(4):528–538.
Shimizu K, Misawa A, Suzuki Y (1994) Toric intraocular lenses: correcting astigmatism while controlling axis shift. J Cataract Refract Surg 20:523–526
Viestenz A, Seitz B, Langenbucher A (2005) Evaluating the eye`s rotational stability during standard photography: effect on determining the axial orientation of toric intraocular lenses. J Cataract Refract Surg 31:557-561
Results of higher power toric intraocular lens implantation Peter C. Hoffmann, MD, Sebastian Auel, MD, Werner W. Hutz, MD