I have heard that some doctors elect to disregard cylinder power up to -0.75 dioper in calculating the initial lens power. How is this possible?
Both High Definition Aspheric and HDX Progressive lenses in your fitting set are very effective in masking astigmatism up to 0.75 diopter or even -1.00 in some cases. It is, therefore, possible to disregard the cylinder and still give a good distance vision. If you are not certain, please follow the fitting guide and calculate initial power based on spherical equivalent.
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