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No its not amblyopia
, its anisometropia- means different powers in different eye.
If you do not correct this anisometropia then the eye with refractory error of -1 may become amblyopic after some time.
So dont worry get it corrected either by wearing glasses or contact lens
Amblyopia means the brain stops sensing signals from that particular eye , so it turns out to be equivalent to being blind on that side.