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A novel method to measure margin reflex distance using the autorefractometer
1Department of Ophthalmology, Abdurrahman Yurtaslan Oncology Training and Research Hospital, University of Health Sciences, Demetevler, Vatan Cd., Yenimahalle, Ankara, 06200, Turkey. drylcdemet@hotmail.com.
International Ophthalmology
|November 5, 2021
Summary
Autorefractometer front monitor images (ARFMI) offer a novel, accurate method for measuring margin reflex distance (MRD). This simple technique provides reliable results for clinical use and follow-up.
Area of Science:
- Ophthalmology
- Ophthalmic Imaging
- Clinical Measurement
Background:
- Accurate measurement of the margin reflex distance (MRD) is crucial in ophthalmology.
- Conventional methods for MRD assessment can be subjective and time-consuming.
- Exploring novel, objective, and efficient measurement techniques is essential.
Purpose of the Study:
- To determine the margin reflex distance (MRD) in healthy subjects using autorefractometer front monitor images (ARFMI).
- To validate the accuracy and reliability of ARFMI for MRD measurement.
- To compare ARFMI measurements with conventional methods.
Main Methods:
- One hundred eyes from 50 healthy subjects (aged 20-59 years) were analyzed.
- Autorefractometer front monitor images were captured using smartphone video recording.
- MRD was analyzed from screenshots, and results were compared with digital photography and manual measurements across two observer visits for repeatability and reproducibility.
Main Results:
- The mean MRD-1 measured by ARFMI was 4.29 ± 0.90 mm, showing higher mean differences compared to digital photography (3.78 ± 1.03 mm) and manual methods (4.02 ± 1.09 mm) (p < 0.001).
- ARFMI exhibited the highest repeatability with an intraclass correlation coefficient (ICC) of 0.960.
- Significant differences were noted in inter-eye MRD-1 measurements between ARFMI and digital imaging groups (p=0.001, p=0.002).
Conclusions:
- Margin reflex distance measurement using ARFMI analysis is a novel, simple, accurate, reliable, and objective method.
- The autorefractometer device is readily available in ophthalmic clinics, facilitating easy MRD measurement and recording.
- ARFMI provides accurate and reliable results suitable for patient follow-up and medicolegal documentation.
