The role of Interactive Binocular Treatment system in amblyopia therapy

Zhale Rajavi, Hamideh Sabbaghi, Ebrahim Amini Sharifi, Narges Behradfar, Mehdi Yaseri, Zhale Rajavi, Hamideh Sabbaghi, Ebrahim Amini Sharifi, Narges Behradfar, Mehdi Yaseri

Abstract

Purpose: To determine the role of Interactive Binocular Treatment (I-BiT™) as a complementary method of patching in amblyopia therapy.

Methods: In this randomized clinical trial study, 50 unilateral amblyopic children (25 male/25 female) between 3 and 10 years with either best corrected visual acuity (BCVA) ≤20/30 in the amblyopic eye or a difference of BCVA ≥ 2 lines between the two eyes were included. They were randomly classified into the case and control groups (25 in each). Patching was recommended in both groups, and cases also received I-BiT™. Cases were asked to play I-BiT™ games through appropriate glasses with conjugate colored filters. Moving and fixed targets were shown to the amblyopic and non-amblyopic eyes, respectively. Playing games was continued 20 min in each session for 5 days a week within one month (total time: 6.6 h). Patching was continued for one month more in both groups to evaluate the continuous effect of I-BiT™. BCVA was measured at baseline, one month after beginning I-BiT™, and one month after cessation of I-BiT™.

Results: BCVA of amblyopic eyes in cases and controls were 0.34 ± 0.14 and 0.33 ± 0.17LogMAR at baseline which improved to 0.17 ± 0.14 and 0.26 ± 0.17 at one month, respectively. The difference was significant in each group (p < 0.001 for cases and p = 0.024 for controls) with more improvement in the case group (p < 0.001). One month after cessation of I-BiT™, BCVA difference between the two groups was not statistically significant. There was no case with recurrence of amblyopia.

Conclusion: Based on our results, I-BiT™ seems to be effective in amblyopia therapy accompanied with patching. We recommend comparing I-BiT™ alone with patching in further studies. ClinicalTrials.gov Identifier: NCT02740725.

Keywords: Amblyopia; Interaction Binocular Treatment (I-BiT™); Patch therapy.

Figures

Fig. 1
Fig. 1
Schematic views (red/green) of I-BiT™ games. A. Pac-Man; B. Tetris; C. Snake.
Fig. 2
Fig. 2
The flowchart of our study. BCVA: Best Corrected Visual Acuity; n: number.
Fig. 3
Fig. 3
BCVA of both groups at base line, end, and one month after cessation of I-BiT™ treatment. BCVA: Best Corrected Visual Acuity; LogMAR: Logarithm Minimum Angle of Resolution.

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Source: PubMed

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