KNOW YOUR TOPOGRAPHER – SUBTRACTIVE MAPS
Watch the following video to help you get the best results from your topographer.
✅ TASKS TO DO
Get a baseline map for a patient and then a review map taken over a minus powered soft contact lens.
Use the Subtractive function (B-A) using the axial power scale to show the power change caused. This should be the same as the lens power.
Get familiar with-
- Selecting the baseline and review map.
- Altering the scale to around 1.00D more than the lens power so the scale is appropriate
Additional resource-