Disclosed herein, inter alia, are a method, system and a kit for improving adefined condition in a subject, themethod comprising selecting a set of one or more correction zones, beingsurface zones on the surface of the subject's skin orde-fined angular zones in the subject's field of view, the one or morecorrection zones being associated with the condition； andplac-ing the one or more correcting elements in said one or more correctionzones to thereby cause improvement in said condition.Also provided herein are methods and systems for providing such correctionzones related to a defined condition in a subject or toa defined cause in a subject being associated with a defined condition.
