What are the potential consequences of wearing counterfeit or unapproved contact lenses? How can I verify the authenticity of my contact lenses?

Jun 1, 2019 ... What does it mean to be nearsighted? Nearsightedness (myopia) is the ... For example, if the axis is 180 degrees the astigmatism is horizontal. Much like the power/sphere figure that is shown on all standard prescriptions, the cylinder for toric lenses denotes the extra visual requirements needed for ... » BRAND = The brand name given to the contact lens - for example "Soflens" or "Acuvue". For astigmatic patients, there is also the following parameters: » CYL ( ... They basically mean the same thing. The LARS/CAAS method is a way to determine the contact lens axis for next trial lens or final lens prescription, if a ... Mar 25, 2025 ... What Does Power Mean for Contacts? ... PWR means refractive power, but sometimes it can be abbreviated as SPH (sphere). This is the amount of ... The axis number on your contact lenses prescription or glasses prescription helps them know how to place the cylindrical power correctly in your lenses. What Does My Contact Lens Prescription Mean? contact lens prescription. The ... The axis gives the angle needed to correct your vision. Here, you'll see ... CYL - Cylinder (usually a number between -0.5 to -2.25). AX - Axis ... A contact lens prescription is not the same as an eyeglass prescription. In ... What is the diameter of contact lenses? The diameter of a contact lens ... What does 'cylinder' mean? Cylinder (CYL) is always a minus number, such as ... Colored Contacts & Circle lenses · Toric Colored Contacts & Circle lens ... What Do The Words Sphere, Cylinder and Axis Mean? Not all eyeglass ...