Cylinder (CYL): The cylinder will always be a minus number that increases in measures of 0.25. Much like the power/sphere figure that is shown on all standard ...

11 окт. 2024 г. · The axis tells you where your astigmatism is located and how it's oriented on your eye. It's always between 0 and 180 degrees.

4. CYL & AXIS: a Cylinder (CYL) and Axis number (between 0 and 180 degrees) are required to correct Astigmatism. Both parameters will be required ...

CYL means cylinder. This measurement is only recorded on your prescription if you have astigmatism. Astigmatism is any abnormality in the curvature of the ...

CYL - for cylinder; AXIS - for astgmatism. Locate the prescription on the side of the box as seen below: Read the measurement of the diameter (DIA), given in ...

Additionally, the term "Axis" will appear on the prescription, referring to the way that the cylindrical lens needs to be tilted to correct the astigmatism.

» Axis (or Axes, AX or X) = A number between 0 and 180 (note that 0 = the same as 180). This is the orientation of your astigmatism (e.g., 180,160, 90, etc.)

The CYL (or cylinder) on your prescription shows the extra strength needed at a specific angle to correct the vision of an eye with an uneven curve. This is ...

The cylinder value is required for the production of contact lenses for astigmatism. It is a negative value that corrects the corneal curvature. Axis is needed ...