I'm not an expert, but it certainly gave the amblyopic eye an advantage for close range which is where the nonamblyopic eye was struggling after a day of study/

I'm not an expert, but it certainly gave the amblyopic eye an advantage for close range which is where the nonamblyopic eye was struggling after a day of study/work. The base value in my calculation is a regular prescription, so adding one diopter would put it in the area of a reading glasses prescription.