What is vertex distance and how does it affect the power of vision correction needed?

Oct 31, 2019 ... INDEX · Base Curve (BC): This base curve determines what type of fit is required for the lens to meet the curve of your eye. · Power/Sphere (PWR/ ... Regular Prescription. Eye: Which eyes the prescription line item is for. OD: Right Eye; OS: Left Eye; OU: Both Eyes; SPH: Sphere (this can also be referred ... May 17, 2020 ... Part 13: What does DIA Mean? ... DIA is short for "Diameter" and, like BC, is something found on contact lens prescriptions. It refers to the ... Sep 17, 2024 ... ... is OU (oculus uterque) meaning both eyes. The next term on your prescription is Sphere (SPH) and is are measured in diopters (D). This ... 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 ... Apr 12, 2021 ... If your vision needs to be corrected, you'll be given a prescription for eyeglasses or contact lenses. Eye prescriptions can be hard to decipher ... Dec 1, 2021 ... Any patient who did not show up would mean a large gap in the schedule. ... did not want to proceed with a contact lens fitting. Some ... Apr 5, 2022 ... Codes like “D, CYL, and AXIS” are all over your prescription, but what do they mean? Many people need different levels of vision correction ... ... CYL is short for cylinder. The cylinder indicates the lens power ... would appear. % OFF* YOUR FIRST CONTACTS ORDER! Use code: *Discount applied ... Aug 18, 2023 ... What is an Eye Prescription? The Importance of Eye Prescriptions; Components of an Eye Prescription. Sphere (SPH); Cylinder (CYL); Axis.