Posters

A comparative study between spherical and aspheric intraocular lenses for their effects on higher order aberrations in the postoperative period

Poster Details

First Author: R.Deshpande INDIA

Co Author(s):    A. Satija   K. Dole   M. Deshpande              

Abstract Details

Purpose:

To compare the effect of implantation of spherical and aspheric foldable intraocular lenses on post-operative Higher order aberrations and its impact on quality of vision.Other objectives were to compare the uncorrected and best spectacle corrected visual acuity in the post-operative period at one week and one month, to compare the higher order aberrations in the post-operative period after phacoemulsification and IOL implantation at 3 months, to compare contrast sensitivity, between the pseudophakic eyes implanted with the spherical or aspheric IOLs after phacoemulsification at 3 months and to assess visual satisfaction of the patient 3 months postoperatively by the VF-7 questionnaire

Setting:

Study was conducted at H. V. Desai Eye Hospital, Pune, a tertiary eye care centre located in western Maharashtra.

Methods:

All patients undergoing cataract surgery, willing to participate in the study and able to give written informed consent were included.They were divided into two groups based on their choice of intraocular lenses.Preoperative LogMAR visual acuity, optical biometry , Wavefront aberrometry , Contrast sensitivity and VF7 questionnaire scores were collected by a single optometrist. Patient underwent phacoemulsification surgery with intraocular lens implantation by standard technique by single surgeon. Post-operative data was collected-AT week 1 and week 5: Visual acuity using LogMAR chart.At 3 Month post-operatively,Internal Higher order aberrations , Contrast sensitivity testing and Visual Satisfaction of patients was evaluated.

Results:

The mean age of the patients in this study was 64 ± 8 years with a majority of patients (60%) being females. There is no significant difference in post-operative visual acuity between the two groups. Total internal HOA and internal SA were significantly lower (~50%) in eyes implanted with aspheric IOLs (p value 0.004, 0.0001) compared to the spherical group. Coma and trefoil induced by both groups of IOLs was comparable (p value >0.05). Contrast sensitivity of patients of aspheric group was significantly better (p value <0.05), however the VF7 scores were comparable between the two groups.

Conclusions:

The optical design of the aspheric IOLs negatively influenced higher order aberrations mainly spherical aberrations. The reduced higher order aberrations contributed to better contrast sensitivity with aspheric IOLs. Visual acuity and patient satisfaction is independent of IOL asphericity.

Financial Disclosure:

None