ESCRS - FPM08.01 - Refractive Outcome Of Intraoperative Aberrometry In Predicting Intraocular Lens Power In Short Eyes And Comparing It With Optical Biometry

Refractive Outcome Of Intraoperative Aberrometry In Predicting Intraocular Lens Power In Short Eyes And Comparing It With Optical Biometry

Published 2022 - 40th Congress of the ESCRS

Reference: FPM08.01 | Type: Free paper | DOI: 10.82333/sama-rp68

Authors: ARUN KUMAR JAIN* 1 , Muskan Bansal 1 , Chintan Malhotra 1 , Amit Gupta 1

1Advanced Eye Centre,PGIMER,Advanced Eye Centre,PGIMER,Chandigarh,India

Purpose

To evaluate the accuracy of intraoperative aberrometry [IOA] in IOL power calculation and compare it with conventional IOL power calculating formulae: 3rd generation (SRK/T and Hoffer Q); 4th generation (Haigis, Holladay II)  and fifth generation (Barrett universal II, Hill RBF) formulae, which were derived using preoperative biometry.

Setting

Tertiary care Centre, Cataract and Refractive Services of Advanced Eye Centre, PGIMER, Chandigarh, INDIA.

Methods

In this prospective study 65 eyes of 57 patients, with axial hyperopia (AL<22.0mm), underwent phacoemulsification with intraoperative aberrometry (ORA, Alcon Laboratories, Inc.) assisted IOL implantation between Jan 2018 to June 2019. All surgeries were performed by a single surgeon (AKJ). Preoperative optical biometry was performed using partial coherence interferometry (PCI) (ZEISS IOLMaster 700, Carl Zeiss Meditec, Jena, Germany) and then intraocular lens power was calculated using  following IOL power calculating formulas: (1) SRK/T  (2) Hoffer Q (3) Haigis (4) Holladay II (5) Barrett Universal II. Hill RBF was calculated through online calculator. Postoperative refraction was noted at 1 month.

Results

Mean absolute prediction error with IA was 0.374 ±0.346D. Hyperopic shift with IA was 46.15%. Outcomes within ±0.5D of target in IA was 67.69% which was superior to SRK-T (63.08%)>Barrett (60.00%)>Holladay-II (53.85%)>Haigis (50.77%), but was inferior to Hill-RBF (70.77%) and Hoffer-Q (69.23%). Outcome within ±1D of target in IA was 95.38% which was superior to Hoffer-Q (93.85%)>SRK-T (93.85%)>Haigis (84.62%)>Hollday-II (80.00%) but was similar to Barrett (95.38%) and inferior to Hill-RBF (96.92%). All these results were statistically significant. Hoffer-Q gives minimum hyperopic shift (30.76%) followed by Hill-RBF (38.46%), Holladay-II (38.46%), Haigis (43.07%) and then IA.

Conclusions

This is first prospective study with single type of IOL plate form, comparing IOA with Hill RBF formulae for calculating IOL power in short eyes. IOA is effective in predicating IOL power in cases of axial hyperopia and found superior to most of available formula except Hill-RBF in such cases. Hill-RBF is found to be best available IOL power formula for cases with axial hyperopia.