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Comparative Evaluation of Multiple Nomograms for Predicting Postoperative Vault after Implantable Collamer Lens Surgery.
Journal of Cataract and Refractive Surgery 2023 September 6
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, USA.
DESIGN: Retrospective chart review.
METHODS: This study was a retrospective analysis of 209 eyes of 106 patients who underwent STAAR Surgical ICL implantation. Analyses were performed based on the availability of preoperative parameters, varying the number of eyes for each test. Mean absolute error (MAE) of predicted vs. actual postoperative vault was calculated for each nomogram. The frequency of Kim, Rocamora (Least Absolute Shrinkage and Selection Operator-Optical Coherence Tomography (LASSO-OCT)), Russo, and Reinstein recommending the correct ICL size in instances when Parkhurst, Optimized White-to-White (WTW), and STAAR could not recommend a definitive ICL size was determined. Univariate and multivariable linear regression analysis was performed between preoperative measurements and vault.
RESULTS: The Kim, Rocamora, Russo, and Reinstein nomograms had significantly lower MAE of predicted vs. actual postoperative vault than the KSV2 and Nakamura V3 nomograms. The Russo formula most frequently recommended the correct ICL size when the Parkhurst, Optimized WTW, and STAAR nomograms could not provide ICL size recommendations. At the 0.05 significance level, anterior chamber depth (ACD), ciliary body inner diameter (CBID), and pupil diameter were the parameters found to have significant correlation with postoperative vault.
CONCLUSIONS: The Kim, Rocamora, Russo, and Reinstein nomograms were the most predictive of vault. Additionally, ACD, CBID, and pupil diameter were found to be significantly correlated with vault and should be considered for use in future ICL sizing nomograms.
SETTING: Private practice in Draper, Utah, USA.
DESIGN: Retrospective chart review.
METHODS: This study was a retrospective analysis of 209 eyes of 106 patients who underwent STAAR Surgical ICL implantation. Analyses were performed based on the availability of preoperative parameters, varying the number of eyes for each test. Mean absolute error (MAE) of predicted vs. actual postoperative vault was calculated for each nomogram. The frequency of Kim, Rocamora (Least Absolute Shrinkage and Selection Operator-Optical Coherence Tomography (LASSO-OCT)), Russo, and Reinstein recommending the correct ICL size in instances when Parkhurst, Optimized White-to-White (WTW), and STAAR could not recommend a definitive ICL size was determined. Univariate and multivariable linear regression analysis was performed between preoperative measurements and vault.
RESULTS: The Kim, Rocamora, Russo, and Reinstein nomograms had significantly lower MAE of predicted vs. actual postoperative vault than the KSV2 and Nakamura V3 nomograms. The Russo formula most frequently recommended the correct ICL size when the Parkhurst, Optimized WTW, and STAAR nomograms could not provide ICL size recommendations. At the 0.05 significance level, anterior chamber depth (ACD), ciliary body inner diameter (CBID), and pupil diameter were the parameters found to have significant correlation with postoperative vault.
CONCLUSIONS: The Kim, Rocamora, Russo, and Reinstein nomograms were the most predictive of vault. Additionally, ACD, CBID, and pupil diameter were found to be significantly correlated with vault and should be considered for use in future ICL sizing nomograms.
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