If I understand your meaning of "lazy eye" correctly, you are suffering from amblyopia
in that eye. This means that due to some reason this eye does not have useful vision. As a result the whole stress
of vision falls on the other eye which causes strain in the good eye. You are advised to consult an eye specialist to find the cause of lazy eye and the status of good eye so that the necessary treatment if any could be given.
God bless you