Astigmatism correction: Laser in situ keratomileusis versus posterior chamber collagen copolymer toric phakic intraocular lens implantation

Asato, Hirotaka; Kojima, Takashi; Isogai, Naoki; Tamaoki, Akeno; Nakamura, Tomoaki; Ichikawa, Kazuo

doi:10.1016/j.jcrs.2011.10.034

Cited by 13 publications

(15 citation statements)

References 19 publications

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“…These results were consistent with the study by Hasegawa et al,15 who reported a higher predictability of correction with FS-LASIK compared to toric phakic IOL (pIOL) in eyes with moderate refractive cylinder (1.50–2.75 D) compared to high cylinder >3 D, where toric pIOL was found to have better predictability. The authors speculated that this difference was due to difference in the units of refractive cylinder correction since the refractive cylinder power of the T-ICL comes in 0.50 D increments, while the corrective refractive cylinders used in LASIK are in 0.25 D steps 15…”

Section: Discussionsupporting

confidence: 92%

Matched population comparison of visual outcomes and patient satisfaction between 3 modalities for the correction of low to moderate myopic astigmatism

Ganesh¹,

Brar²,

Pawar³

2017

OPTH

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PurposeTo compare toric implantable collamer lens (T-ICL), femto-LASIK, and ReLEx SMILE for the treatment of low to moderate myopic astigmatism in terms of long-term visual and refractive outcomes and predictability of astigmatic correction.Materials and methodsThe study included 30 eyes from 30 patients between the age groups of 21 and 40 years, undergoing bilateral surgery with any of the three procedures – T-ICL, femto-LASIK, or ReLEx SMILE – for correction of myopic astigmatism within the range of −3 to −8 D spherical equivalent (SE), with a minimum astigmatism of −0.75 D. Patients were followed up at day 1, 1 month, 6 months, and 1 year.ResultsAt 1 year, the mean cylinder reduced to −0.21±0.28, −0.17±0.36, and −0.22±0.28 D in the T-ICL, femto-LASIK, and ReLEx SMILE group, respectively. The predictability of astigmatism correction was comparable, with no statistically significant difference between the 3 groups (P>0.05). A total of 97% of eyes in ReLEx SMILE achieved a uncorrected distance visual acuity of 20/20 or better, compared to T-ICL (93%) and FS-LASIK (90%). However, gain in lines of corrected distant visual acuity (CDVA) was maximum in T-ICL group (60%). Four eyes in the femto-LASIK group had loss of CDVA by one line. Three eyes required exchange due to high vault and rotation of the T-ICL, which did not affect the final outcome.ConclusionAll 3 modalities were effective for myopic astigmatism at the end of 1 year. Quality of vision and patient satisfaction with T-ICL and ReLEx SMILE were similar and better than FS-LASIK. However, slight chances of postoperative rotation and exchange exist with T-ICL, which warrant thorough preoperative planning.

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Section: Discussionsupporting

confidence: 92%

Matched population comparison of visual outcomes and patient satisfaction between 3 modalities for the correction of low to moderate myopic astigmatism

Ganesh¹,

Brar²,

Pawar³

2017

OPTH

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“…The authors found significant regression in sphere but no statistically significant change in cylinder between 1-week and 1-year exams (mean cylinder −0.67±0.54 D at 1 week and −0.63±0.63 D at 1 year). 5 The study was conducted on 48 eyes with preoperative refractive cylinder of −2.74±0.99 D. Similar findings were presented in the study of Hasegawa et al 6 where refractive cylinder remained stable up to 12 months postoperatively in patients with moderate-to-high myopic astigmatism. A small change in refractive cylinder in our study showed statistical significance probably due to the large sample size (compared to other studies); however, it would be interesting to evaluate whether there was a further change beyond the 3-month postoperative visit.…”

Section: Discussionsupporting

confidence: 70%

Clinical outcomes of wavefront-guided laser in situ keratomileusis to treat moderate-to-high astigmatism

Schallhorn

Venter²,

Hannan³

et al. 2015

OPTH

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PurposeThe purpose of this study was to evaluate the refractive and visual outcomes of wavefront-guided laser in situ keratomileusis (LASIK) in eyes with myopic astigmatism and cylindrical component ≥2.0 diopter (D).MethodsIn this retrospective study, 611 eyes that underwent LASIK for simple or compound myopic astigmatism were analyzed. Preoperative refractive cylinder ranged from −2.00 D to −6.00 D (mean −2.76±0.81 D), and the sphere was between 0.00 D and −9.75 D (mean −2.79±2.32 D). Predictability, visual outcomes, and vector analysis of changes in refractive astigmatism were evaluated.ResultsAt 3 months after LASIK, 83.8% of eyes had uncorrected distance visual acuity of 20/20 or better, 90.3% had manifest spherical equivalent within ±0.50 D, and 79.1% had residual refractive cylinder within ±0.50 D of intended correction. The mean correction ratio for refractive cylinder was 0.92±0.14, the mean error of angle was −0.45°±2.99°, and the mean error vector was 0.37±0.38 D. A statistically significant correlation was found between the error of magnitude (arithmetic difference in the magnitudes between surgically induced refractive correction and intended refractive correction) and the intended refractive correction (r=0.26, P<0.01).ConclusionWavefront-guided LASIK for the correction of myopic astigmatism is safe, effective, and predictable.

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“… 15 and Hasegawa et al. 16 who reported favorable one-year results with LASIK in cases of moderate to high astigmatism. Katz et al.…”

Section: Discussionmentioning

confidence: 96%

Two-year results of femtosecond assisted LASIK versus PRK for different severity of astigmatism

Miraftab

Hashemi

Asgari

2018

Journal of Current Ophthalmology

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PurposeTo compare two-year results of femtosecond laser assisted LASIK (femto-LASIK) and photorefractive keratectomy (PRK) in terms of astigmatism correction in patients with less than 2.0 diopters (D) of spherical error and more than 2.0 D of cylinder error.MethodsIn this retrospective study, data were extracted from 100 patient charts. The two study groups were matched by age, gender, and baseline uncorrected distance visual acuity (UDVA) and refractive astigmatism (RA). Preoperative astigmatism was categorized as mild: 2.00 to <3.00 D, moderate: 3.00 to <4.00 D, and severe: ≥4.00 D.ResultsMean RA in the femto-LASIK and PRK groups was respectively −3.15 ± 0.94 D (−7.00 to −2.00 D) and −3.29 ± 0.95 D (−6.25 to −2.00 D) at baseline (P = 0.284), and −0.61 ± 0.40 D and −0.62 ± 0.60 D one year after surgery (P = 0.674), but significantly lower in the femto-LASIK group (−0.61 ± 0.39 vs. −0.83 ± 0.56 D, P = 0.021) at 2 years when the rate of residual astigmatism more than 1.0 D was 6.3% in the femto-LASIK and 19.6% in the PRK group (P = 0.046). Mean UDVA in the femto-LASIK group (0.02 ± 0.05 logMAR) was better than the PRK group (0.06 ± 0.10 logMAR) (P = 0.025). Mean corrected distance visual acuity (CDVA) was not significantly different between groups (0.01 ± 0.03 vs. 0.01 ± 0.04 logMAR, P = 0.714). Both groups had 1–4 Snellen lines CDVA improvement. The three subgroups of baseline astigmatism did not differ significantly in terms of residual astigmatism (all P > 0.05). However, in subgroups with ≥4.00 D cylinder, there was less astigmatic regression at 1 year in the femto-LASIK group (0.28 ± 0.43 D) than the PRK group (0.54 ± 0.68 D) (P = 0.007).ConclusionsOur results pointed to better two-year results with femto-LASIK in the treatment of different degrees of astigmatism. UDVA improvement was superior with femto-LASIK, but the two methods did not significantly differ in terms of CDVA improvement.

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Astigmatism correction: Laser in situ keratomileusis versus posterior chamber collagen copolymer toric phakic intraocular lens implantation

Cited by 13 publications

References 19 publications

Matched population comparison of visual outcomes and patient satisfaction between 3 modalities for the correction of low to moderate myopic astigmatism

Matched population comparison of visual outcomes and patient satisfaction between 3 modalities for the correction of low to moderate myopic astigmatism

Clinical outcomes of wavefront-guided laser in situ keratomileusis to treat moderate-to-high astigmatism

Two-year results of femtosecond assisted LASIK versus PRK for different severity of astigmatism

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