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Sometimes called ‘sphere’ or ‘strength’. Measured in diopters, it is always preceded by a + (plus) or a – (minus) and goes up in 0.25 increments.


The shape of the back surface of the lens, which determines how the lens fits. It is usually an 8.x or 9.x number.


Refers to the width across the lens in millimeters. Most brands come in one size. It is usually a 14.x number, but can range from 13.x to 15.x.


Refers to the amount of extra power needed to correct the astigmatism. It will always appear as – (minus) number.


Indicates the placement of the extra power in a toric lens. This oval band could run up and down, right to left, or at any angle in between; with an axis between 0 and 180 degrees.

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Product Information



The Biomedics55 Evolution lenses by CooperVision help to control spherical aberrations with their aspherical design. The aspherical design also enhances image quality and provides crisp and clear vision regardless of the prescription. Their patented lens edge design also helps to relieve discomfort related to friction while blinking. Biomedics 55 Evolution lenses also come with UV protection.


Features & fit

  • SKU: 824442699123_config
  • Lenses In Box: 6 lenses/box
  • Manufacturer: CooperVision
  • BC: 8.6
  • Diameter: 14.2
  • Cylinder: No
  • Axis: No
  • Add Power: No
  • Wear Time: 1 month
  • Material: Ocufilcon D
  • Fluid Content: 55
  • Descriptive Colour: Clear

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