Laser in situ Keratomileusis for Correction of Induced Astigmatism From Cataract Surgery

Abstract

PURPOSE: To evaluate the efficacy, predictability, stability, and safety of laser in situ keratomileusis (LASIK) to correct residual astigmatism after cataract surgery. METHODS: LASIK was performed on 20 eyes of 20 patients with refractive myopic or mixed astigmatism (3.00 to 6.00 D) at least 1 year after extracapsular cataract extraction with posterior chamber intraocular lens implantation without complication. Each eye received bitoric LASIK with the Nidek EC-5000 excimer laser and the Automated Corneal Shaper microkeratome. RESULTS: At 6 months after LASIK, mean refractive cylinder decreased from 4.64*0.63 D to 0.44±0.24 D (P<.001). Mean percent reduction of astigmatism was 90.4*5.0% (range 80% to 100%). Mean spherical equivalent refraction decreased from -2.19±0.88 D (range -1.00 to -3.88 D) to -0.32±0.34 D (range -1.25 to +0.38 D) (P<.001). Vector analysis showed that the mean amount of axis deviation was 0.7±1.2° (range 0° to 4.3°) and the mean percent correction of preoperative astigmatism was 92.1*5.9% (range 85.6% to 108%). Eighty-five percent of all eyes had a mean spherical equivalent refraction and mean cylinder within ±0.50 D of emmetropia. Change in spherical equivalent refraction and cylinder from 2 weeks to 6 months was =S0.50 D in 90% (18 eyes) and 95% (19 eyes), respectively. Spectacle-corrected visual acuity was not reduced in any eye. Diffuse lamellar keratitis occurred in three eyes (15%) after LASIK, and were treated successfully with eyedrops. CONCLUSION: LASIK was an effective, predictable, stable, and safe procedure for correction of residual myopic or mixed astigmatism ranging from 3.00 to 6.00 D with a low spherical component after cataract surgery. [J Refract Surg 2003;19: 416-424]

Evaluation of Biometry Parameters of patients from a Tertiary Eye Care Centre

“…Understanding the distribution of astigmatism is important to help ophthalmologists choose first-line treatment that will be most effective and reduce the occurrence of postoperative astigmatism. This includes procedures such as limbal relaxing incisions [11], opposite clear corneal incisions [18], excimer laser refractive procedures [9,13,14], femtosecond laser-assisted astigmatic keratotomy [15], and toric IOL implantation [16][17]. At present, toric IOL implantation is highly recognized and it can be used to correct up to 8.0 D of corneal astigmatism after cataract surgery [18,19].…”

Astigmatism Management in Modern Cataract Surgery

“…Surface ablation procedures, such as laser-assisted in situ keratomileusis (LASIK), can be utilized to manage postoperative residual astigmatism. Norouzi et al [ 63 ] found that LASIK was effective, predictable, and safe in correcting astigmatism ranging from 3 to 6D when performed one year after routine cataract surgery.…”

Clinical outcomes and rotational stability following implantation of a monofocal toric IOL with textured haptics in normal versus high axial lengths

“…[1][2][3] Toric intraocular lenses (IOLs) have been shown to be superior over LRIs or excimer laser surgery for refractive accuracy and stability while treating preexisting corneal astigmatism along with surgical aphakia. [4][5][6][7][8][9][10][11][12] One of the challenges after toric IOL implantation, however, is a potential risk of postoperative rotation and deviation from the intended axis, requiring a surgical repositioning. Rotation of a toric IOL from its intended axis can degrade its cylindrical corrective power by 3.3% for every 1 degree off axis.…”

“…1–3 Toric intraocular lenses (IOLs) have been shown to be superior over LRIs or excimer laser surgery for refractive accuracy and stability while treating preexisting corneal astigmatism along with surgical aphakia. 4–12…”