What are the penalties for selling or purchasing contact lenses without a valid prescription? How can I protect my eyes and vision while wearing contact lenses?

Cylindrical correction (CYL): Cylindrical correction is the second number ... protecting the eyes by using contacts carefully, wearing sunglasses and ... Apr 20, 2017 ... What does CYL mean? CYL is short for cylinder. Cylinder indicates ... The reason is angular; contacts are made to fit the curvature of ... Reading your contact lens or eyeglass prescription is simple once you understand a few values and what they mean. With this knowledge, you can partner with ... Sep 26, 2023 ... Knowing the proper axis is crucial for ensuring your lenses are correctly aligned. Why Is Your Contact Lens Prescription Different? If you ... 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 ... Jul 18, 2020 ... What do OD and OS Mean? · Sphere (SPH): The amount of lens power, measured in diopters (D), which corrects nearsightedness or farsightedness. If you do not have astigmatism, the CYL and AXIS boxes will be blank. ADD is ... This ensures your prescription for glasses or contact lenses is always up to date ... Aug 28, 2015 ... Overall, the prescription layout is pretty similar as there is the designation for left and right eyes (OS/OD), the prescription power (SPH, CYL ... Jun 7, 2024 ... “Plano” is a term used in eye prescriptions to indicate that there is no refractive error in the spherical component of the lens prescription. Sep 6, 2015 ... What does each prescription figure mean? Power/Sphere (PWR/SPH): This figure states whether you are long or short-sighted and how poor your ...