Dioptre correction for spectacle wearers with different visual acuity The dioptre correction on the eyepiece is used to compensate for differences in visual acuity between the eyes. Dioptre adjustment for binoculars Many people have differences in the visual acuity of both eyes. For this reason, binoculars with two identical eyepieces with adjustment options are used to achieve a uniformly sharp image of the object (the differences between the two eyes [...]).
