Purpose: To evaluate the accuracy of the Reinstein formula with hand-held ultrasound biomicroscopy (UBM) measurements for sizing of the Implantable Collamer Lens (ICL).
Methods: A total of 107 myopic eyes of 57 patients implanted with the ICL were included in the study. The size of the ICL was selected based on the manufacturer's recommendations. Agreement between the vault predicted by the Reinstein formula and the vault measured postoperatively was analyzed with Bland-Altman plots.
Results: A total of 95% and 81% of patients had a postoperative vault ranging from 150 to 1,000 and 250 to 750 μm, respectively. The mean vault predicted by the Reinstein formula and the postoperative vault in the current study were 580 ± 181 and 547 ± 200 μm, respectively. The size recommendations of the Reinstein formula and the formula provided by the manufacturer, the Kojima formula, and the Dougherty formula overlapped in 50%, 57%, and 49% of eyes, respectively.
Conclusions: The results show that the Reinstein formula combined with a hand-held UBM provides reliable sizing predictions of the ICL. However, considering that robotic UBM measurements have demonstrated a narrower range of deviation in predicting vault depth in previous studies, a direct comparison study between robotic UBM and hand-held UBM measurements is necessary to fully assess the limitations of combining hand-held UBM with the Reinstein formula. .
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Purpose: To evaluate the accuracy of the Reinstein formula with hand-held ultrasound biomicroscopy (UBM) measurements for sizing of the Implantable Collamer Lens (ICL).
Methods: A total of 107 myopic eyes of 57 patients implanted with the ICL were included in the study. The size of the ICL was selected based on the manufacturer's recommendations.
A review of posterior chamber phakic intraocular lenses.
Curr Opin Ophthalmol
March 2024
Reinstein Vision.
Purpose Of Review: Posterior chamber phakic intraocular lenses (pIOLs) are increasing in popularity as a viable alternative to laser refractive surgery. The purpose of this review is to evaluate the recent updates to pIOLs and to assess the advancements and safety of the procedure.
Recent Findings: Accurate lens sizing is the key determinant to suitable vault prediction, advancements to sizing formulae including the use of very high frequency (VHF) digital ultrasound and the application of artificial intelligence and machine learning has led to improved vault prediction and safety.
Exploring Nomograms for Implantable Collamer Lens Size Selection in Myopia: A Literature-based Compilation.
Clin Ophthalmol
November 2023
Hoopes Vision Research Center, Hoopes Vision, Draper, UT, USA.
Purpose: To provide a comprehensive guide of all implantable collamer lens (ICL) sizing nomograms and the respective preoperative diagnostic devices that are required. This guide would help clinicians in choosing the appropriate ICL size for myopic patients to optimize postoperative vault height.
Methods: A literature search of peer-reviewed journals describing methods and postoperative outcomes of ICL sizing was conducted.
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J Cataract Refract Surg
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From the Hoopes Vision Research Center, Hoopes Vision, Draper, Utah (Moshirfar, Hoopes); John A. Moran Eye Center, University of Utah School of Medicine, Salt Lake City, Utah (Moshirfar); Utah Lions Eye Bank, Murray, Utah (Moshirfar); University of Arizona College of Medicine Phoenix, Phoenix, Arizona (Han, Jaafar, Santos, Theis); Pacific Northwest University of Health Sciences, Yakima, Washington (Stoakes).
Purpose: To compare the vault predictability of most available implantable collamer lens (ICL) sizing nomograms and identify which preoperative measurements are predictive of vault.
Setting: Private practice in Draper, Utah.
Design: Retrospective chart review.
Purpose: To identify parameters influencing the postoperative vault of the Implantable Collamer Lens (ICL) (STAAR Surgical) using the Artemis Insight 100 very high-frequency (VHF) digital ultrasound robotic scanner (ArcScan, Inc) and develop a model to improve lens vault prediction.
Methods: This was a retrospective analysis of 147 consecutive V4c EVO and EVO+ ICL implantation procedures performed over three phases in myopic eyes. In the initial phase, lens size was defined by published sulcus-to-sulcus and crystalline lens rise measurements (Kojima formula) from VHF digital ultrasound biometry.
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