Intraocular lens calculations in patients with previous sequential radial keratotomy and LASIK/PRK

Christopher, Karen L; Ifantides, Cristos; Lynch, Anne M.; Patnaik, Jennifer L

doi:10.1097/j.jcrs.0000000000000913

Cited by 2 publications

(3 citation statements)

References 8 publications

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Section: Discussionmentioning

confidence: 99%

“…5 This led to the fifth paper, a JCRS report in 2022, which expanded on Barrett Formulae but focused on Barrett History (post-RK and post-LASIK) in 10 eyes with sequential RK and LASIK, thus similar to this study but without the analysis of a great variety of formulae. 6 This study aimed to address a lack in the existing literature on patients with cataracts who underwent both RK and LASIK. The primary objective of this investigation was to conduct a comparative analysis of formulae derived from various IOL calculation platforms, including Haigis-L, Galilei, Shammas, Panacea, Barrett, Camellin-Callosi-Camellin, Double K-Modified Holladay, Potvin-Hill, Pearl, and OCT.…”

Section: Discussionmentioning

confidence: 99%

“…In light of the scarcity of studies addressing the accuracy of IOL calculators among cataract patients with both RK and LASIK, our study aimed to evaluate the precision and reliability of various IOL calculators to address this specific cohort of patients. To our knowledge, only two studies have addressed this concern, 5 , 6 but with a limitation of only using Barrett True K No History and Barrett True K (with Prior RK or LASIK history) formulae. Thus, despite the small sample size, this study – which analyzes 12 online formulae – may provide valuable information regarding refractive care for patients with RK and LASIK.…”

Section: Introductionmentioning

confidence: 99%

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Precision in IOL Calculation for Cataract Patients with Prior History of Combined RK and LASIK Histories

Moshirfar,

Ayesha,

Jaafar

et al. 2024

OPTH

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Purpose This study aimed to evaluate the accuracy of 12 intraocular lens (IOL) power calculation formulae for eyes that have undergone both radial keratotomy (RK) and laser assisted in situ keratomileusis (LASIK) surgery to determine the efficacy of various IOL calculations for this unique patient group. Currently, research on this surgical topic is limited. Methods In this retrospective study, 11 eyes from 7 individuals with a history of RK and LASIK who underwent cataract surgery at Hoopes Vision were analyzed. Preoperative biometric and corneal topographic measurements were performed. Subjective refraction was obtained postoperatively. Twelve different intraocular lens (IOL) power calculations were used: Barrett True K No History, Barrett True K (prior LASIK, Prior RK history), Barrett Universal 2, Camellin-Calossi-Camellin (3C), Double K-Modified Holladay, Haigis-L, Galilei, OCT, PEARL-DGS, Potvin-Hill, Panacea, and Shammas. Results The rankings of mean arithmetic error (MAE), from least to greatest, were as follows: 3C (0.088), Haigis-L-L (−0.508), Shammas (−0.516), OCT Average (−0.538), Barrett True K (−0.557), OCT RK (−0.563), Galilei (−0.570), IOL Master (−0.571), OCT LASIK (−0.583), Barrett True K No History (−0.597), Pearl-DGS (−0.606), Potvin-Hill SF (−0.770), Potvin-Hill TNP (−0.778), Panacea (−0.876), and Barrett Universal 2 (−1.522). The 3C formula achieved the greatest percentage of eyes within ±0.25 D of target range (91%), while Haigis-L, Shammas, Galilei, Potvin Hill, Barrett True K, IOL Master, PEARL-DGS, and OCT formulae performed similarly, achieving 45% of eyes within ±0.75D of target refraction. Conclusion This study demonstrates the accuracy of the lesser known 3C formula in IOL calculation, particularly for patients who have undergone both RK and LASIK. Well-known formulae, such as Haigis-L, Shammas, and Galilei, which are used by the American Society of Cataract and Refractive Surgery (ASCRS), are viable options, although 3C formulae should be considered in this patient population. Furthermore, larger studies can confirm the best IOL power formulas for post-RK and LASIK cataract patients.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%