Evaluation of the repeatability of macular vascular analysis with swept-source optical coherence tomography angiography (SS-OCTA) in young high myopic patients

Author: Mehmet Akif Erol (Turkey)

Co-authors: Mehmet Akif Erol, Mustafa Değer Bilgeç, Nazmiye Erol, Hülya Özen

Purpose

We aimed to evaluate SS-OCTA repeatability and its relationship to the value of refractive errors in high myopic patients.

Setting/Venue

The study was conducted on high myopic patients who came to the Eskisehir Osmangazi University hospital ophthalmology clinic for routine examination.

Methods

Refractive error values of minus 6 and below were considered as high myopia and between minus 6 and 12 were included in the study. In addition to a routine eye examination, macula superficial and deep vascular plexus (SVP and DVP) density parameters were measured twice in one hour with SS-OCTA. Repeated measurements were compared statistically. Intraclass correlation coefficient(s) (ICC) based on a 2-way random-effects model were used to evaluate the consistency of paired measurements. ICC values less than 0.5 were interpreted as an indicator of poor repeatability, values between 0.5 and 0.75 as moderate repeatability, values between 0.75 and 0.9 as good repeatability, and values greater than 0.90 as excellent repeatability.

Results

A total of 40 high myopic eyes were included in the study. Both SVP and DVP 1mm center density measurement repeatabilities are excellent (ICC values are 0.969 and 0.968 respectively). SVP inferior quadrant, DVP superior and nasal quadrant measurement repeatabilities are good (ICC values are 0.787, 0.81 and 0.779 respectively). SVP superior, temporal, nasal and DVP temporal, inferior quadrant measurement repeatabilities are moderate (ICC values are 0.612, 0.642, 0.651, 0.631 and 0.615 respectively). Poor repeatability was not seen on any quadrant measurement.

Conlusions

The repeatability rates in macular field measurements with SS-OCTA in highly myopic patients are adequate.

Financial Disclosure

No financial interest