J Korean Ophthalmol Soc.  2008 Oct;49(10):1589-1596.

Excimer Laser Refractive Surgery to Correct Anisometropia due to Residual Astigmatism After Cataract Surgery

• Lee KM
• Kim EC
• Kim MS

Abstract

PURPOSE
To evaluate the clinical effect of photorefractive keratectomy (PRK) and laser assisted in situ keratomileusis (LASIK) on eyes with anisometropia due to residual astigmatism after cataract surgery.
METHODS
We retrospectively reviewed the medical records of 11 eyes of 11 patients who had undergone cataract surgery from March 2002 to November 2005. PRK (2 eyes) and LASIK (9 eyes) was performed on 11 eyes with refractive myopic or mixed astigmatism over 1.5D after cataract surgery. RESULT: Before laser surgery, the mean astigmatism was 3.23+/-1.02D and the mean spherical equivalent (SE) was -2.27+/-1.43D. Six months after laser surgery, the mean SE was 0.66+/-0.58D and the mean astigmatism was 0.73+/-0.39D. The changes in mean manifest SE and astigmatism were statistically significant between paired preoperative and postoperative values (p<0.05). At 6 months after surgery, the mean uncorrected visual acuity and best corrected visual acuity significantly improved to 0.65+/-0.17 and 0.84+/-0.11, respectively. Three eyes (27.3%) developed mild haze and were treated without sequelae. There were no other complications.
CONCLUSIONS
Excimer laser surgery appears to be a clinically useful procedure to correct residual astigmatism after cataract surgery.

Keyword

Astigmatism; Cataract; LASIK; PRK

MeSH Terms

Anisometropia
Astigmatism
Cataract
Eye
Humans
Keratomileusis, Laser In Situ
Laser Therapy
Lasers, Excimer
Medical Records
Photorefractive Keratectomy
Refractive Surgical Procedures
Retrospective Studies
Visual Acuity

Figure

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  Figure 1. Spherical equivalent refraction (A) and cylindrical refraction (B) over 6 months after excimer laser surgery to correct residual refractive error following cataract surgery in 11 eyes. Spherical equivalent and cylindrical refraction decreased significantly after excimer laser surgery (* p<0.05).

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  Figure 2. Time course of uncorrected visual acuity (UCVA) and best corrected visual acuity (BCVA) for 11 eyes with excimer laser surgery for residual refractive error after cataract surgery. UCVA and BCVA improved at 2 weeks after surgery and were stable until 6 months after surgery. (* p<0.05)

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  Figure 3. Postoperative change in best corrected visual acuity (BCVA) in 11 eyes after excimer laser surgery for induced astigmatism following cataract surgery. The final BCVA improved by 1 line in 4 eyes (36.4%) and was unchanged in 7 eyes (63.6%) at 6 months.

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