Binocular amblyopia treatment with contrast-rebalanced movies.
J AAPOS
; 23(3): 160.e1-160.e5, 2019 06.
Article
in En
| MEDLINE
| ID: mdl-31103562
ABSTRACT
BACKGROUND:
Binocular amblyopia treatments promote visual acuity recovery and binocularity by rebalancing the signal strength of dichoptic images. Most require active participation by the amblyopic child to play a game or perform a repetitive visual task. The purpose of this study was to investigate a passive form of binocular treatment with contrast-rebalanced dichoptic movies.METHODS:
A total of 27 amblyopic children, 4-10 years of age, wore polarized glasses to watch 6 contrast-rebalanced dichoptic movies on a passive 3D display during a 2-week period. Amblyopic eye contrast was 100%; fellow eye contrast was initially set to a lower level (20%-60%), which allowed the child to overcome suppression and use binocular vision. Fellow eye contrast was incremented by 10% for each subsequent movie. Best-corrected visual acuity, random dot stereoacuity, and interocular suppression were measured at baseline and at 2 weeks.RESULTS:
Amblyopic eye best-corrected visual acuity improved from 0.57 ± 0.22 at baseline to 0.42 ± 0.23 logMAR (t26 = 8.09; P < 0.0001; 95% CI for improvement, 0.11-0.19 logMAR). Children aged 3-6 years had more improvement (0.21 ± 0.11 logMAR) than children aged 7-10 years (0.11 ± 0.06 logMAR; t25 = 3.05; P = 0.005). Children with severe amblyopia (≥0.7 logMAR) at baseline experienced greater improvement (0.24 ± 0.12 logMAR) than children with moderate amblyopia at baseline (0.12 ± 0.06 logMAR; t25 = 3.49; P = 0.002).CONCLUSIONS:
In this cohort, passive viewing of contrast-rebalanced dichoptic movies effectively improved visual acuity in amblyopic subjects. The degree of improvement observed was similar to that previously reported for 2 weeks of binocular games treatment and with 3-4 months of occlusion therapy.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Refraction, Ocular
/
Vision, Binocular
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Visual Acuity
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Amblyopia
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Video Games
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Computers, Handheld
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Motion Pictures
Type of study:
Observational_studies
/
Prognostic_studies
Limits:
Child
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Child, preschool
/
Female
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Humans
/
Male
Language:
En
Journal:
J AAPOS
Journal subject:
OFTALMOLOGIA
/
PEDIATRIA
Year:
2019
Document type:
Article