ArticleClinical ophthalmology (Auckland, N.Z.)2025
Biometric Factors in the VRF-G Formula for IOL Power Calculation.
Article in Clinical ophthalmology (Auckland, N.Z.), 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
1 citing paper in PubMed.
- Clinical Interchangeability Boundaries of Pentacam AXL WAVE in Preoperative Biometry for Cataract Surgery: An Agreement Study with IOLMaster 700 and Pentacam.Journal of clinical medicine · 2026Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
7 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Purpose: To assess the contribution of each optional parameter to the IOL power calculation and evaluate the effect of omitting biometric variables (ACD, LT, WTW) using the VRF-G formula. Methods: A total of 501 eyes from 501 consecutive patients included in the study underwent cataract surgery with in-the-bag implantation of one-piece soft hydrophobic acrylic posterior chamber IOLs, AcrySof IQ SN60WF (Alcon Labs, Fort Worth, TX, USA). The primary calculation comprised five measured variables, and IOL power was recalculated for different combinations of omitting ACD, LT, and WTW. Outcome measurements included the difference in IOL power calculations between different omission combinations. Results: Omitting any of the biometric variables resulted in a significant difference in the mean difference in IOL power calculation (ranging from 0.029 to 0.108 diopters), except for WTW omission alone (0.002 diopters). ACD proved to have the most impact, with its omission resulting in larger differences in power calculations (range: 0.177-0.248 diopters) compared to combinations where ACD was not omitted (range: 0.057-0.141 diopters). The shortest eyes were most affected by ACD omission. Conclusion: The study highlights the importance of ACD in IOL power calculations, particularly for shorter eyes. WTW and LT were found to be less important when using the VRF-G formula for IOL power calculations.
Indexed as
Identifiers
What Socratic holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.