A simple smartphone-aided technique to quantify toric IOL alignment

Session Details

Session Title: Presented Poster Session: Infection & Imaging

Venue: Poster Village: Pod 2

First Author: : A.Pujari INDIA

Co Author(s): :    R. Singh   S. Yadav   N. Sharma   R. Mukhija   J. Urkude           

Abstract Details

Purpose:

Purpose: To describe a novel smartphone based technique to quantify the toric IOL orientation in the post operative period.

Setting:

Setting: Dr. Rajendra Prasad Centre for Ophthalmic Sciences, AIIMS. New Delhi. India.

Methods:

Methods: A commercially available macro lens is clipped onto a smartphone (I phone 7, Apple Inc) and the camera application containing 360 degrees’ protractor is opened (protractor application is commercially available online for less than 5 USD). Patients who underwent toric IOL surgery, were imaged by aligning the protractor centre with the corneal centre, and by superimposing the outer rim of protractor onto the limbus. This focusing can be confirmed by a perfect centration with clear appreciation of three dots on the IOL. A total of 10 toric IOL patients were included in the final assessment.

Results:

Results: The average age was 62 years. Eight patients were male and six patients had surgery in the right eye. Nine patients achieved an unaided visual acuity of 20/20 and one patient achieved 20/25. The mean slit lamp quantified IOL position was 7651.39 degrees and the smartphone derived postoperative IOL position was 74.652.01 degrees. On paired t-test, a mean difference of 1.41.77 degrees was noted between the two methods and the p value was marginally significant. (p=0.03), therefore, at 95% confidence interval a difference from 0.12 to 2.67 degrees is expected between the two methods.

Conclusions:

Conclusions: Using smartphone-macro lens combination, toric IOL alignment can be quantified easily and quite accurately with minimal technical difficulties.

Financial Disclosure:

None