Toric Intraocular Lens for Astigmatism Correction in Cataract Patients

Document Type : Original Article

Authors

1 Department of Ophthalmology, Feiz Hospital, Isfahan University of Medical Sciences, Isfahan, Iran

2 Department of Ophthalmology, Kashani Hospital, Shahrekord University of Medical Science, Isfahan, Iran

Abstract

Background: To assess the clinical consequences of AcrySof toric intraocular lens (IOL) and Hoya toric IOL implantation to correct preexisting corneal astigmatism in patients undergoing cataract surgery. Materials and Methods: In this study, we examined 55 eyes of 45 patients with at least 1.00 D corneal astigmatism who were scheduled for cataract surgery. After phacoemulsification, toric IOL was inserted and axis was aligned. We observed the patients' uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), keratometry, manifest refraction, and IOL axis alignment 6 months after surgery. Results: After 6 months, the UDVA was 0.17 ± 0.17 logMAR in the AcrySof group and 0.17 ± 0.18 logMar in the Hoya group. More than 78% of eyes in the AcrySof group and 80% of eyes in the Hoya toric IOL achieved a UDVA of 20/40 or better. In the AcrySof group, the mean preoperative corneal astigmatism was 2.73 ± 0.92 D. The mean postoperative refractive astigmatism was 0.84 ± 0.63 D. In the Hoya group, the preoperative corneal astigmatism was 2.58 ± 0.76 D and the postoperative refractive astigmatism was 0.87 ± 0.66 D (P < 0.05). The mean AcrySof IOL axis rotation was 1.88° ± 3.05°. In the Hoya group, the mean axis rotation was 1.53° ± 3.66°. All changes in visual and refractive data before and after surgery were statistically significant (P < 0.05). There was no significant difference between the two groups regarding refractive and visual outcome after surgery (P > 0.05 for all). Conclusion: Implantation of AcrySof toric IOL and Hoya toric IOL was an effective way to correct preexisting corneal astigmatism in cataract surgery.

Keywords

1.
Agresta B, Knorz MC, Donatti C, Jackson D. Visual acuity improvements after implantation of toric intraocular lenses in cataract patients with astigmatism: A systematic review. BMC Ophthalmol 2012;12:41.  Back to cited text no. 1
    
2.
Hoffer KJ. Biometry of 7,500 cataractous eyes. Am J Ophthalmol 1980;90:].  Back to cited text no. 2
    
3.
Shimizu K, Misawa A, Suzuki Y. Toric intraocular lenses: Correcting astigmatism while controlling axis shift. J Cataract Refract Surg 1994;20:].  Back to cited text no. 3
    
4.
Hoffmann PC, Hütz WW. Analysis of biometry and prevalence data for corneal astigmatism in 23,239 eyes. J Cataract Refract Surg 2010;36:1479-85.  Back to cited text no. 4
    
5.
Grabow HB. Intraocular correction of refractive errors. In: Kershner RM, editor. Refractive Keratotomy for Cataract Surgery and the Correction of Astigmatism. Thorofare, NJ: Slack Inc; 1994. p. 79-115.  Back to cited text no. 5
    
6.
Mingo-Botín D, Muñoz-Negrete FJ, Won Kim HR, Morcillo-Laiz R, Rebolleda G, Oblanca N. Comparison of toric intraocular lenses and peripheral corneal relaxing incisions to treat astigmatism during cataract surgery. J Cataract Refract Surg 2010;36:1700-8.  Back to cited text no. 6
    
7.
Mendicute J, Irigoyen C, Aramberri J, Ondarra A, Montés-Micó R. Foldable toric intraocular lens for astigmatism correction in cataract patients. J Cataract Refract Surg 2008;34:601-7.  Back to cited text no. 7
    
8.
De Silva DJ, Ramkissoon YD, Bloom PA. Evaluation of a toric intraocular lens with a Z-haptic. J Cataract Refract Surg 2006;32:1492-8.  Back to cited text no. 8
    
9.
Ahmed II, Rocha G, Slomovic AR, Climenhaga H, Gohill J, Grégoire A, et al. Canadian Toric Study Group. Visual function and patient experience after bilateral implantation of toric intraocular lenses. J Cataract Refract Surg 2010;36:609-16.  Back to cited text no. 9
    
10.
“Acrysof IQ Toric IOL Surgeon Keys for Success and Acknowledgment.” Acrysof IQ Toric IOL Resource Center. Alcon Surgical. Available from: http://www.alconsurgical.com/pdfs/TOR11392MS.pdf/. [Last accessed on 2014 Jan 01].  Back to cited text no. 10
    
11.
Hoya Surgical Optic, Tokyo, Japan. Available from: http://www.hoyasurgicaloptics.com/ap/product/hoya-toric/. [Last accessed on 2014 Jan 01].  Back to cited text no. 11
    
12.
Alpins N. Astigmatism analysis by the Alpins method. J Cataract Refract Surg 2001;27:31-49.  Back to cited text no. 12
    
13.
Zuberbuhler B, Signer T, Gale R, Haefliger E. Rotational stability of the AcrySof SA60TT toric intraocular lenses: A cohort study. BMC Ophthalmol 2008;8:8.  Back to cited text no. 13
    
14.
Bauer NJ, de Vries NE, Webers CA, Hendrikse F, Nuijts RM. Astigmatism management in cataract surgery with the AcrySof toric intraocular lens. J Cataract Refract Surg 2008;34:1483-8.  Back to cited text no. 14
    
15.
Myers TD, Olson RJ. Comparison of the effects of viscoelastic agents on clinical properties of the Unfolder lens injection system. J Cataract Refract Surg 1999;25:953-8.  Back to cited text no. 15
    
16.
Pereira FA, Milverton EJ, Coroneo MT. Miyake-Apple study of the rotational stability of the Acrysof toric intraocular lens after experimental eye trauma. Eye (Lond) 2010;24:376-8.  Back to cited text no. 16
    
17.
Chang DF. Comparative rotational stability of single-piece open-loop acrylic and plate-haptic silicone toric intraocular lenses. J Cataract Refract Surg 2008;34:1842-7.  Back to cited text no. 17