ESCRS - FPM08.12 - Outcomes Of Intraoperative Biometry (Optiwave Refractive Analysis) In Post-Radial Keratotomy Eyes Undergoing Cataract Surgery

Outcomes Of Intraoperative Biometry (Optiwave Refractive Analysis) In Post-Radial Keratotomy Eyes Undergoing Cataract Surgery

Published 2022 - 40th Congress of the ESCRS

Reference: FPM08.12 | Type: Free paper | DOI: 10.82333/15ja-tf26

Authors: Amit Gupta* 1 , Barkha Gupta 1 , Sraddha Limbu 1 , Tripti Chaudhary 1

1Ophthalmology,Postgraduate Institute of Medical Education and Research,Chandigarh,India

Purpose

To report the refractive outcomes of Intraoperative Biometry assisted cataract surgery using
ORA (Optiwave Refractive Analysis) in Post-Radial Keratotomy (RK) eyes.

Setting

Cornea and Refractive Services of Advanced Eye Centre, Post Graduate Institute of
Medical Education and Research (PGIMER), Chandigarh, India

Methods

A retrospective consecutive case series including 15 eyes of 11 patients. Pre-
operatively optical biometry was done on IOL master 700. Intraoperatively, ORA was done
to obtain aphakic refractive measurements and IOL power estimation for the selected eye.
Refractive outcomes and predictive accuracy (difference between postoperative actual
refraction and predicted residual error) of ORA was compared with planned outcomes
predicted preoperatively using fourth generation formulas: Haigis L and Barrett True-K.

Results

The mean age of study population was 49.09 ± 6.57 years and mean axial length
was 27.97 ± 2.39mm. Postoperative best corrected visual acuity was 0.266 ± 0.11 logMAR
units with spherical equivalent of -1.6 ± 0.73D. Postoperatively, all patients had visual acuity
better than 20/70 with 40% eyes better than 20/30. The mean absolute error (MAE) was least
with intraoperative ORA (0.63 ± 0.74) as compared to Haigis L (3.1 ± 2.2, p 0.003) and
Barrett True K formulas (1.13 ± 0.85, p 0.09). ORA recommended IOL values were within
0.5 D in 66.6% and ≤ ± 1.0 D in 26.6% eyes compared to 39.90% and 20% within 0.5D and
1D respectively with Barrett True-K versus 6.66% and 26.67% respectively with Haigis L.

Conclusions

Optiwave Refractive Analysis significantly improves the refractive outcomes of cataract
surgery in complicated cases, especially post RK eyes. Highest predictive accuracy was
observed with ORA followed by Barrett True K; and Haigis L showed large mean absolute
refractive error.