Efficacy of a remote based computerised visual acuity measurement
- Department of Optometry, Manipal College of Allied Health Science, Manipal University, Karnataka, India
- Correspondence to S Ve Ramesh, Department of Optometry, Manipal College of Allied Health Science, Manipal University, Manipal, Karnataka 576104, India;
Contributors All authors contributed to the conceptualisation, design, conduct of the study and data collection. Statistical analysis, writing the paper and critical review were performed by KS and SVeR. All authors reviewed and accepted the final submitted or publishable draft of the manuscript.
- Accepted 25 March 2012
- Published Online First 26 April 2012
Aim To determine the efficacy of a remotely operated computer-based logarithmic (logMAR) visual acuity chart.
Methods Visual acuity was tested using a laptop or computer-based logMAR chart (COMPlog) for all subjects by two different methods. The methods differed by the physical presence and absence (remote) of an optometrist and in the mode of instructions provided. Remote access was obtained through the internet, using Teamviewer software to control the system linked to COMPlog and instructions were provided by telephone. The order of measurements and the eye to be tested was randomised. logMAR visual acuity and time taken were recorded. A questionnaire was used to assess the participant's feedback.
Results Intraclass correlation for visual acuity between the two methods (α=0.964, 95% CI 0.937 to 0.979). There was no statistically significant difference (p=0.648) in the median visual acuity measurement between the two methods (median difference 0.00, IQR 0.20 logMAR). The time taken between the two methods was not statistically significant (p=0.457). There was no significant difference in the responses to the questionnaire between the study methods (p=0.119).
Conclusions Tele (remotely controlled) visual acuity measurement is as reliable as that measured with the physical presence of an optometrist.
- field of vision
- optic nerve
- tele screening
- visual acuity
Competing interests None.
Patient consent Obtained.
Ethics approval Ethics approval was obtained from the Institutional Review Board, MCOAHS, Manipal University, Karnataka, India.
Provenance and peer review Not commissioned; externally peer reviewed.