Biometry in cataract surgery

Moshirfar, Majid; Buckner, Benjamin; Ronquillo, Yasmyne C; Hofstedt, Daniel

doi:10.1097/icu.0000000000000536

Cited by 24 publications

(20 citation statements)

References 19 publications

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“…In this study, anterior surface simulated keratometry values did not differ significantly between the IOLMaster and ANTERION. Yang New SSOCT biometers are thought to be more often successful at evaluating axial length in opaque cataracts based on their optical principles [13]. In our study, AL measurements were successful in 95% of the cases both with SSOCT and PCI.…”

Section: Discussionmentioning

confidence: 49%

Comparative analysis of two optical biometry devices: high wavelength swept source OCT versus partial coherence interferometry

Szalai

Csutak

2021

Int Ophthalmol

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Purpose To study the reproducibility of measurements performed with a recently developed multimodal high resolution swept source optical coherence tomography (SSOCT) and to make comparisons with a partial coherence interferometry (PCI) biometer. Methods One hundred and fifty-two eyes of 152 subjects were involved in this study with a mean age of 65.71 ± 13.86 years (26–85 years). Anterior surface keratometry (K), anterior chamber depth (ACD), white-to-white (WTW) and axial length (AL) values were recorded by the SSOCT (ANTERION, Heidelberg Engineering Ltd, Germany) and PCI (IOLMaster 500, version 5.5, Carl Zeiss Meditec, Germany). Intraocular lens (IOL) power was calculated based on ANTERION and IOLMaster keratometry values by using five traditional vergence formulas. Results Anterior surface simulated keratometry values did not differ significantly between the IOLMaster and ANTERION (P > 0.05). AL measurements were successful in 95% of the cases both with the SSOCT and PCI. No significant difference was disclosed between the two instruments (P = 0.229). For WTW measurements, a significant difference was observed between the two optical biometers (P < 0.0001). The difference between PCI and SSOCT in IOL powers was statistically significant for SRK/T, Hoffer and Holladay formulas (P < 0.001). Conclusion Our results implicated an overall good reproducibility of anterior keratometry, AL, ACD and WTW measurements for IOLMaster and ANTERION. The discrepancies between their measurements resulted in significant difference in the calculated IOL power for SRK/T, Hoffer and Holladay formulas, but not for Haigis formula.

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Section: Discussionmentioning

confidence: 49%

Comparative analysis of two optical biometry devices: high wavelength swept source OCT versus partial coherence interferometry

Szalai

Csutak

2021

Int Ophthalmol

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“…Ultrasound has long been used to measure axial length followed by PCI, optical low coherence reflectometry (OCLR) and swept-source optical coherence tomography (SS-OCT) technologies, so-called optical biometer [9]. The advantages of optical biometers are true axial length measurement between the tear and the retinal pigment epithelium through the visual axis, noncontact, faster measurements and high repeatability and reproducibility [10].…”

Section: Progress In Intraocular Lens Formulas and Biometrymentioning

confidence: 99%

Advancements in intraocular lens power calculation formulas

Chung

Afshari

2021

Current Opinion in Ophthalmology

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Purpose of reviewWe review recent studies comparing intraocular lens (IOL) formulas with an emphasis on selection of the highest performing formulas based on patient axial length, age, and history of previous corneal refractive surgery. Recent findingsThe Barrett Universal II formula based on a theoretical model has consistently demonstrated high accuracy. The Olsen four-factor formula using ray tracing optics and the Hill-RBF calculator using artificial intelligence have also demonstrated good prediction results after being updated. Notably, the Kane formula, incorporating artificial intelligence, has overall shown the best performance for all axial lengths. Although newly developed and updated IOL formulas have improved refractive prediction in patients with short or long axial length eyes or prior history of corneal refractive surgery, these challenging cases still require special consideration. The Barrett True-K formula has shown accurate results regardless of preoperative data in eyes with previous myopic refractive surgery. SummaryAdvancements in optical biometry and IOL calculation formulas continue to improve refractive outcomes. The clinician can optimize refractive outcomes in the majority of patients with the use of formulas that have shown consistent results and accuracy in several large studies.

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“…Additionally, it is not required to have patients take out their soft contact lenses longer than two days before biometry. 56 Another recent review study came to the conclusion that the gold standard for determining axial length in cataracts of any kind is SS-OCT. We have mentioned a review of literature of a few of the recent clinical studies on various optical biometers in Table 3 .…”

Section: Introductionmentioning

confidence: 99%

Current Concepts and Recent Updates of Optical Biometry- A Comprehensive Review

Pathak,

Sahu,

Kumar

et al. 2024

OPTH

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One of the most recent advancements in the field of cataract surgery is optical biometry. With the advent of optical biometry ocular measurements are now simpler, quicker, and more precise. The devices have made intraocular lens (IOL) power calculations easier in difficult situations too, such as in cases with extremes of axial lengths, silicone filled eyes, cataract surgery in post-keratoplasty eyes, post Laser-Assisted in Situ Keratomileusis (LASIK) eyes, etc. The gold standard for IOL power calculation in the present day is by the use of optical biometry devices. The anatomical measurements by these devices are highly precise and because of these measurements and the incorporation of various IOL power calculation formulas the optical biometry devices give the accurate power and the post-operative visual outcome is highly satisfactory among the patients. The growing use of these devices has made cataract the most commonly performed refractive surgical procedure nowadays. In the current scenario, optical biometry has widespread acceptance in almost all countries and has many advantages over ultrasound or immersion biometry. Cataract surgeons can obtain easy and reliable measurements from these devices. Refractive surprises have also decreased considerably with their use. This article will comprehensively review the principles of the various optical biometry devices, the parameters used in each of the devices, the advantages and disadvantages, and add more like what all this article will add.

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Biometry in cataract surgery

Cited by 24 publications

References 19 publications

Comparative analysis of two optical biometry devices: high wavelength swept source OCT versus partial coherence interferometry

Comparative analysis of two optical biometry devices: high wavelength swept source OCT versus partial coherence interferometry

Advancements in intraocular lens power calculation formulas

Current Concepts and Recent Updates of Optical Biometry- A Comprehensive Review

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