Cylinders in Eyeglasses: What They Do and Their Role in Your Prescription
Cylinders (CYL) in eyeglasses correct astigmatism. They show the lens power needed to balance differences in vision strength within the eye. This power is measured in diopters and usually aligns at a 90-degree angle. Understanding cylinders helps provide clearer vision for individuals with astigmatism. In a prescription, the cylinder value is represented in diopters. This … Read more