Refractive outcome of intraoperative aberrometry in predicting intraocular lens power in short eyes and comparing it with optical biometry

Session Details

Session Title: Posterior Capsule Opacification/IOL Power Calculations

Session Date/Time: Tuesday 17/09/2019 | 14:00-16:00

Paper Time: 15:34

Venue: Free Paper Forum: Podium 2

First Author: : A.Jain INDIA

Co Author(s): :    G. Gupta   C. Malhotra   M. Bansal                       

Abstract Details

Purpose:

To study the refractive outcome of intraoperative aberrometry in calculating intraocular lens (IOL) power and comparing it with various IOL power calculating formulas (SRK-T, Hoffer Q, Holladay I) which were derived using preoperative optical biometry.

Setting:

Advanced Eye Center, Post graduate institute of medical education and research [PGIMER], Chandigarh, India

Methods:

It is a retrospective study in which patients with short eyes(axial length <22mm), who underwent phacoemulsification with intraoperative aberrometry and IOL implantation, during 2017, were included and their data was analysed. Patients with corneal opacity, poor fixation or retinal abnormality were excluded. total of 29 eyes of 24 patients were finally included. Biometric parameters such as optical axial length and keratometry were done using IOL master 500 (Carl Zeiss Meditec AG) and preoperative IOL power was calculated using SRK-T, Hoffer Q and Holladay-I formulas. Intraoperative aberrometry done using ORA (Alcon Laboratories, Inc.). Postoperative refraction was noted at 1 month.

Results:

Study comprised 29 eyes of 24 patients. Mean Axial length was 21.42±0.60 mm. Mean absolute prediction error with intraoperative aberrometry (ORA) was 0.38±0.34D, which was less than Holladay I (0.49±0.49D); HofferQ (0.49±0.51D); SRK-T (0.62±0.54D) (P<0.05). With ORA, percentage of patients within (±0.50D; ±1.0D) of target were (75.8%;93.1%), which was better than HofferQ (69%;86.2%), Holladay I (65.5%;89.7%) and SRK-T (55.2%;79.3%). Hyperopic shift with ORA (34.5%) < HofferQ (37.9%) < SRK-T (55.2%) < Holladay I (62.1%)

Conclusions:

Intraoperative aberrometry is better than preoperative biometry formulas (Hoffer Q, Hollday I, SRK-T) in predicting Intraocular lens (IOL) power in short eyes. Amongst the biometric formulas, Hoffer Q is found to be better than Hollday I and SRK-T in terms of IOL power prediction for such cases.

Financial Disclosure:

None