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If the child's vision isn't too bad (generally better than 20/100 visual acuity), an alternative to patching may be to use eye drops in the stronger eye.  The eye drops will dilate the pupil and cause blurred vision in the stronger eye.   With the stronger eye blurred, the amblyopic eye has a better chance of regaining vision.    Similar to occlusion therapy, the dilating drops have to be used for a long time, sometimes 6 months or more, and such "penalization" therapy only works if the amblyopia is only mild to moderate.