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Br J Ophthalmol 84:572-578 doi:10.1136/bjo.84.6.572
  • Original Article
    • Clinical science

Efficacy of occlusion for strabismic amblyopia: can an optimal duration be identified?

Table 3

Comparison of the mean (SD) change in GAC score for the strabismic and dominant eyes for the six quantities of occlusion worn, by unpaired Student's t test (n=119)

Quantity of occlusion n Strabismic eye Dominant eye df t Value p Value
Initial to ⩽200 hours 105 0.144 (0.202) 0.024 (0.156) 208 −4.85 0.0001
>200 to ⩽400 78 0.076 (0.141) 0.022 (0.088) 154 −2.88 0.005
>400 to ⩽600 55 0.051 (0.151) 0.016 (0.089) 108 −1.48 0.14
>600 to ⩽800 44 0.028 (0.148) 0.016 (0.074) 86 −0.50 0.62
>800 to ⩽1000 36 0.021 (0.129) 0.039 (0.079) 70 0.71 0.48
>1000 36 0.007 (0.006) 0.010 (0.083) 70 0.41 0.68
Post-occlusion to final 119 0.013 (0.056) −0.018 (0.082) 236 0.77 0.44
  • Indicates significant at 5% level.

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