Wipe the indicated area softly with a dry cloth. In case of hard stain on the main unit cover, wipe it with a damp cloth or neutral cleanser It is better no to use a spray cleaner directly on the head unit to avoid getting liquid in between the ...
STEP 1 Select the desired Smart program on the left hand column. In the example : Smart Fast STEP 2 If needed, check the acuity prior to starting the Smart Fast Protocol STEP 3 Save the Visual Acuity by selecting the smallest lines of letters.