What is the weakest and strongest prescription can you fill?
For negative SPH power, we can process a prescription range from -0.25 to -18.00.
For positive SPH power, we can process a prescription range from +0.25 to +10.00.
For CYL power, we can process a range from 0.00 to +4.50 and 0.00 to -4.50.
For ADD power, we can process a range from +1.00 to +3.50.
For the other prescriptions beyond these ranges of the power, please contact our customer service for more information (including prism correction, high cylinder prescription).