Prisms
Prism and Base are usually left empty, as they are not seen in most prescriptions. Prism refers to a displacement of the image through the lens, and is used to treat eye muscle imbalances or other conditions (see vergence dysfunction) that cause errors in eye orientation or fixation. Prism correction is measured in "prism diopters", and Base refers to the direction of displacement.
Direction Type: Vertical or Horizontal
Delta: 1/2,1,2,4,6,8,10,12,15,20,25,30,35,40,45,50 (1..
$122.58
Horizontal Delta: 1,2,4,6,8,10,12,14,16,18,20,25,30,40 & 45 (16 deltas)
Vertical D..
$100.74
Direction Type: Vertical or Horizontal
Delta: 1/2,1,2,3,4,5,6,7,8,9,10,12,14,16,18,20,25,30,..
$153.23
Direction Type: Vertical or Horizontal
Delta: 1 2 3 4 5 6 7 8 9 10 15 20 25 30 40 50 60 80(1..
$193.06
Showing 1 to 4 of 4 (1 Pages)