Accuracy of Six Intraocular Lens Power Calculations in Eyes with Axial Lengths Greater than 28.0 mm

Moshirfar, Majid; Durnford, Kathryn M; Jensen, Jenna L.; Beesley, Daniel P.; Peterson, Telyn S.; Darquea, Ines M.; Ronquillo, Yasmyne C; Hoopes, Phillip C

doi:10.3390/jcm11195947

Cited by 9 publications

(6 citation statements)

References 42 publications

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“…Although the Kane formula based on AI and cloud computing has shown excellent performance in patients with long axial length and no history of refractive surgery 34,35 , it exhibited signi cant differences in this study compared to the expected results. We believe there are three possible reasons for this: 1) the formula lacks a speci c postrefractive surgery module, preventing the use of historical data despite including CCT as a parameter; 2) the formula innovatively uses sex as a mandatory parameter but does not include WTW (white to white); 3) the development of the Kane formula was based on data from over 30,000 Caucasian individuals, while our study included only Northern Chinese individuals of East Asian descent.…”

Section: Discussionmentioning

confidence: 56%

Comparison of the accuracy of 9 intraocular lens power calculation formulas after SMILE in Chinese myopic eyes

Li,

Yuan,

Yang

et al. 2023

Preprint

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As of 2021, over 2.8 million cases of small incision lenticule extraction (SMILE) procedures had been performed in China. However, there remains limited knowledge regarding the selection of intraocular lens (IOL) power calculation formulas for post-SMILE cataract patients. This study included 52 eyes of 26 myopic patients from northern China who underwent SMILE at Tianjin Eye Hospital from September 2022 to February 2023 and was designed to investigate the performance of multiple IOL calculation formulas in post-SMILE patients using a theoretical surgical model. We compared the postoperative results obtained from three artificial intelligence (AI)-based formulas and six conventional formulas provided by the American Society of Cataract and Refractive Surgery (ASCRS). These formulas were applied to calculate IOL power using both total keratometry (TK) and keratometry (K) values, and the results were compared to the preoperative results obtained from the Barrett Universal II (BUII) formula in SMILE cases. Among the evaluated formulas, the results obtained from Emmetropia Verifying Optical 2.0 Formula with TK (EVO-TK) (0.40 ± 0.29 D, range 0 to 1.23 D), Barrett True K with K (BTK-K, 0.41 ± 0.26 D, range 0.01 to 1.19 D), and Masket with K (Masket-K, 0.44 ± 0.33 D, range 0.02 to 1.39 D) demonstrated the closest proximity to BUII. Notably, the highest proportion of prediction errors within 0.5 D was observed with BTK-K (71.15%), EVO-TK (69.23%), and Masket-K (67.31%), with BTK-K showing a significantly higher proportion compared to Masket-K (p < 0.001). Our research indicates that in post-SMILE patients, EVO-TK, BTK-K, and Masket-K may yield more accurate calculation results. At the current stage, AI-based formulas do not demonstrate significant advantages over conventional formulas. However, the application of historical data can enhance the performance of these formulas.

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Section: Discussionmentioning

confidence: 56%

Comparison of the accuracy of 9 intraocular lens power calculation formulas after SMILE in Chinese myopic eyes

Li,

Yuan,

Yang

et al. 2023

Preprint

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“…Their approach could improve the refractive outcomes of post-CRS eyes. Newer formulas based on big data and artificial intelligence (AI), such as the Hill-RBF and Kane formulas, have improved the accuracy of the IOL power calculation ( 45 ). However, it is unclear how these formulas work in post-CRS patients because no studies have been published.…”

Section: Emerging Challenges and A Paradigm Shift In The Management O...mentioning

confidence: 99%

Challenges of refractive cataract surgery in the era of myopia epidemic: a mini-review

Du,

Meng,

et al. 2023

Front. Med.

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Myopia is the leading cause of visual impairment in the world. With ever-increasing prevalence in these years, it creates an alarming global epidemic. In addition to the difficulty in seeing distant objects, myopia also increases the risk of cataract and advances its onset, greatly affecting the productivity of myopes of working age. Cataract management in myopic eyes, especially highly myopic eyes is originally more complicated than that in normal eyes, whereas the growing population of cataract with myopia, increasing popularity of corneal and lens based refractive surgery, and rising demand for spectacle independence after cataract surgery all further pose unprecedented challenges to ophthalmologists. Previous history of corneal refractive surgery and existence of implantable collamer lens will both affect the accuracy of biometry including measurement of corneal curvature and axial length before cataract surgery, which may result in larger intraocular lens (IOL) power prediction errors and a compromise in the surgical outcome especially in a refractive cataract surgery. A prudent choice of formula for cataract patients with different characteristics is essential in improving this condition. Besides, the characteristics of myopic eyes might affect the long-term stability of IOL, which is important for the maintenance of visual outcomes especially after the implantation of premium IOLs, thus a proper selection of IOL accordingly is crucial. In this mini-review, we provide an overview of the impact of myopia epidemic on treatment for cataract and to discuss new challenges that surgeons may encounter in the foreseeable future when planning refractive cataract surgery for myopic patients.

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“…The Kane formula has good predictive accuracy for cataract patients with standard axial length and higher calculation accuracy for short and long-cataract patients. Karmona formula 42 and Hill-RBF 3.0 formula 43 predict diopter errors within ±0.50 D are 98.38% and 93%, respectively. Hill-RBF 3.0 has optimized the data and expanded the domain boundary value, making the formula applicable to more situations.…”

mentioning

confidence: 93%

“…A summary of AI-based IOL formulas is given in Table 1. [38][39][40][41][42][43] The Clarke formula 38 and the Fullmonte formula 41 are prediction IOL formulas based on neural networks. The calculated MAE is relatively large, and the error of the predicted diopter within ±0.50 accounts for a small proportion, so they are rarely used now.…”

mentioning

confidence: 99%

Artificial Intelligence in Ophthalmic Surgery: Current Applications and Expectations

Nuliqiman,

Xu,

Sun

et al. 2023

OPTH

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Artificial Intelligence (AI) has found rapidly growing applications in ophthalmology, achieving robust recognition and classification in most kind of ocular diseases. Ophthalmic surgery is one of the most delicate microsurgery, requiring high fineness and stability of surgeons. The massive demand of the AI assist ophthalmic surgery will constitute an important factor in boosting accelerate precision medicine. In clinical practice, it is instrumental to update and review the considerable evidence of the current AI technologies utilized in the investigation of ophthalmic surgery involved in both the progression and innovation of precision medicine. Bibliographic databases including PubMed and Google Scholar were searched using keywords such as "ophthalmic surgery", "surgical selection", "candidate screening", and "robot-assisted surgery" to find articles about AI technology published from 2018 to 2023. In addition to the Editorials and letters to the editor, all types of approaches are considered. In this paper, we will provide an up-to-date review of artificial intelligence in eye surgery, with a specific focus on its application to candidate screening, surgery selection, postoperative prediction, and real-time intraoperative guidance.

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Accuracy of Six Intraocular Lens Power Calculations in Eyes with Axial Lengths Greater than 28.0 mm

Cited by 9 publications

References 42 publications

Comparison of the accuracy of 9 intraocular lens power calculation formulas after SMILE in Chinese myopic eyes

Comparison of the accuracy of 9 intraocular lens power calculation formulas after SMILE in Chinese myopic eyes

Challenges of refractive cataract surgery in the era of myopia epidemic: a mini-review

Artificial Intelligence in Ophthalmic Surgery: Current Applications and Expectations

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