| Title |
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| Diagnostic Accuracy of a Virtual Reality–Based Tele-Optometry Device (TEFLA) for School Vision Screening: A Cross-Sectional Comparative Study |
| Authors |
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| KARPAGAM DAMODARAN, Rohitha S.M, Sandhiya P, Maheshwari Srinivasan |
| Presenting |
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| KARPAGAM DAMODARAN |
| PURPOSE: |
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| To compare the efficacy of a tele-optometry device (TEFLA) with conventional vision screening methods in school children. |
| METHODS: |
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| TEFLA is a virtual reality–based tele-eye testing device designed by simulating 6 meters through advanced VR optics.Compact, portable, and Wi-Fi enabled, TEFLA supports tele-visual acuity testing and tele-subjective refraction. A cross-sectional comparative study was conducted among school students in Thiruvallur district. Vision screening was performed using a conventional LogMAR chart and the TEFLA virtual LogMAR system. Students were equally divided and tested with both modalities on separate days in randomized order (Group I: TEFLA first; Group II: conventional first). A visual acuity of ≤6/12 was used as the referral cutoff and for sensitivity and specificity analysis. Visual acuity was converted to logMAR for correlation and regression analyses. |
| RESULTS: |
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| RESULTS The study included 202 participants (94 males and 108 females) within the age range of 12 to 17 years.Using LogMAR as the reference standard, TEFLA demonstrated a sensitivity of 94.7%(95% CI: 84.7% to 100%) and specificity of 91.9% (95% CI: 89.2% to 94.6%). The PPV and NPV were 36.7% and 99.7%, respectively.Linear regression analysis showed significant predictive accuracy(R² = 0.57, p <0.001). ICC showed 0.856 (95% CI: 0.824 -- 0.881;two-way mixed absolute agreement), with average measures demonstrating excellent reliability. |
| CONCLUSIONS: |
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| THE TEFLA TELE-OPTOMETRY DEVICE IS AN EFFECTIVE AND RELIABLE TOOL FOR SCHOOL VISION SCREENING. |