Axial eye length measurements pre- and post- laser-assisted in situ keratomileusis using the IOL Master: a pilot study

Chalkiadakis, Spyridon E.; Amariotakis, G; Parikakis, Efstratios; Peponis, V

doi:10.2147/opth.s14332

Cited by 6 publications

(5 citation statements)

References 11 publications

(10 reference statements)

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“…The search found 28 articles and 9 of them were retained as relevant articles ( Table 1 ). In particular: one paper was related to changes occurred after Radial Keratotomy (RK) ( 23 ), six papers after Photorefractive Keratectomy/Laser-Assisted Sub-Epithelial Keratectomy (PRK/LASEK) ( 7 , 24 – 28 ), and two papers after Laser-Assisted in situ Keratomileusis (LASIK) ( 29 , 30 ).…”

Section: Resultsmentioning

confidence: 99%

“…In a 2010 study, Chalkiadakis et al ( 29 ) performed AL measurements using IOLMaster pre and post LASIK to treat 10 eyes of 5 patients with myopic refractive errors ranging from −2.50 to −8.00 spherical equivalent diopters (mean: −5.23 ± 1.30 D). A statistically significant AL decrease was found ( p < 0.05).…”

Section: Resultsmentioning

confidence: 99%

“…Results of Chalkiadakis et al ( 29 ) emphasize the concept of poor correlation between the theoretical ablation depth of the excimer laser treatment and the AL variations, as measured with the IOLMaster. In fact the authors found that, on average, the ablation depth is 0.0734 mm and the AL change is, on average, 0.12 mm.…”

Section: Discussionmentioning

confidence: 99%

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Unexpected ocular morphological changes after corneal refractive surgery: A review

2022

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Corneal refractive surgery (CRS) currently is widely used to correct refractive errors because of its efficacy and reliability. Several studies dealt with the corneal modification induced by this type of surgery, but it is still debated if CRS can induce unexpected changes namely anterior chamber depth (ACD) and axial length (AL). A literature review was performed, including all articles regarding CRS and eye-variations from 1999 to December 2021. Excluding articles about specific systemic conditions (e.g., pregnancy), pathological conditions, post-surgical complications or about only corneal flattening and thinning post CRS, we found nine studies that met the search criteria. We divided the found articles according to the type of surgery performed (radial keratotomy, PRK/LASEK, lasik) and analyzed the results about ACD and AL. Finally, according to the literature, we can conclude that CRS not only gives a corneal flattening, thinning and biomechanical changes, but also induces AL and ACD decrease. This makes the AL and ACD measurements obtained before CRS uselessness in case of IOL power calculation.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Unexpected ocular morphological changes after corneal refractive surgery: A review

2022

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“…An increase in ablation depth of 1micron led to a decrease in axial length of 0.00118 ± 0.00005mm. A study by Chalkiadakis et al 31 stated that the axial length changes between theoretical and practical measurements were not correlating. They could not conclude any correlation between ablation depth and change in axial length.…”

Section: Discussionmentioning

confidence: 98%

Comparative study on incidence of posterior vitreous detachment (PVD) between conventional and femtosecond laser-assisted laser in situ keratomileusis (LASIK)

Chaitanya¹,

Ravindran²,

Anitha³

2021

IJCEO

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To compare incidence of posterior vitreous detachment (PVD) in patients after microkeratome and femtosecond laser-assisted laser in situ keratomileusis (LASIK) using ultrasound B-scan. Prospective, non-randomised, comparative and interventional hospital based study. This study was performed on 138 eyes of 69 patients, 64 eyes in microkeratome group and 74 eyes in femtosecond laser group for a period of 10 months from December 2017 to October 2018. The mean age of patients in microkeratome group was 23.34 years and in femtosecond laser group was 23.19 years. All patients in both the groups underwent one of the two procedure. Patients were assessed for subjective and objective refraction, presence of PVD, subjective complaints of floaters and axial length changes at each visit. At 1 week and 1 month postoperative period there was no PVD in either of the groups and none of the patients complained about disturbing floaters. At one week postoperative period, 17 eyes (26.5%) in microkeratome group and 22 eyes (29.6%) in femtosecond laser group had residual refraction ranging from -0.25D to -0.75D. The changes in axial length following surgery was 0.08 ± 0.08mm in microkeratome group and 0.1 ± 0.07mm in femtosecond laser group at one month. Our study did not demonstrate any difference between both the procedures with respect to posterior segment complications. Patients in our study are relatively younger compared to other studies and hence, age of the patient undergoing LASIK may affect the incidence of PVD.Both microkeratome assisted LASIK and femtosecond assisted LASIK were comparable with respect to posterior segment complications. The mean age of patients in this study is assumed to have an effect on outcome. Whereas axial length, power of the eye, procedure opted did not significantly have any impact on outcome. A larger population with longer follow up is needed in Indian population to conclude our results.

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“…diopters of SE (mean:-5.23 ± 1.30), preoperative and postoperative AL measurements using IOL Master showed a change in AL from mean 25.80 ± 1.01 mm to 25.68 ± 0.93 mm ,one month after surgery ,showing a decrease in AL that did not have a good correlation with theoretical ablation depth. 13 In Rajan et al Study to evaluate long term refractive stability for myopic PRK, they reported stability of refraction at 12 years ,with no signi cant change in mean SE between 1, 6, and 12 years and no late regression in long term. 14 Other studies of myopic refractive surgeries have also shown mild regression in long term.…”

Section: Discussionmentioning

confidence: 99%

Refractive Stability and Ocular Biometric Changes After Customized LASEK for Correction of Myopia; 8 Years Follow up

Hashemian

Es’haghi

Aghaei

et al. 2020

Preprint

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BACKGROUND: To assess long-term Visual and refractive stability and ocular biometric changes in low to moderate myopic subjects treated by customized LASEK. METHODS: Seventy eyes of 35 patients were treated by customized LASEK for correction of less than 6 diopter myopia in this cohort study. Uncorrected visual acuities (UCVA) and distance corrected visual acuities (DCVA), keratometry values and ocular biometric data by Lenstar LS900 including anterior chamber depth (ACD), aqueous depth, central corneal thickness(CCT),lens thickness(LT) and axial length(AL) were evaluated pre and 8 years postoperatively. RESULTS: Mean pre-operative spherical equivalent was -3.99 ±1.38 diopter (D) that improved to 0.01 ±0.27 D and -0.10 ±0.31 D, 6 months and 8 years postoperative respectively. Mean pachymetry, flat, steep and mean keratometry values increased significantly from 6 months to 8 years postoperative. Although, these changes had no significant effect on visual outcomes and subjective refraction. ACD decreased and LT increased significantly over 8 years follow-up in comparison with preoperative values. The change in AL was not significant at 8 years follow up.CONCLUSIONS: The long-term visual and refractive outcomes of customized LASEK in correction of low to moderate myopia were stable and predictable, although changes in ocular biometric parameters have occurred.

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Axial eye length measurements pre- and post- laser-assisted in situ keratomileusis using the IOL Master: a pilot study

Cited by 6 publications

References 11 publications

Unexpected ocular morphological changes after corneal refractive surgery: A review

Unexpected ocular morphological changes after corneal refractive surgery: A review

Comparative study on incidence of posterior vitreous detachment (PVD) between conventional and femtosecond laser-assisted laser in situ keratomileusis (LASIK)

Refractive Stability and Ocular Biometric Changes After Customized LASEK for Correction of Myopia; 8 Years Follow up

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