https://fasteyeglasses.com/blog/Eyeglass guides from Fast Eyeglassesen-us https://fasteyeglasses.com/blog/how-to-read-your-eyeglass-prescription/https://fasteyeglasses.com/blog/how-to-read-your-eyeglass-prescription/Thu, 01 Oct 2026 08:00:00 -0400What OD, OS, SPH, CYL, Axis, ADD and PD mean on an eyeglass prescription, with a real example you can compare to your own Rx before ordering glasses online. https://fasteyeglasses.com/blog/how-to-measure-pd-at-home/https://fasteyeglasses.com/blog/how-to-measure-pd-at-home/Thu, 01 Oct 2026 08:00:00 -0400Measure your pupillary distance (PD) at home with a mirror and a millimeter ruler. Single vs. dual PD, normal PD ranges for adults and kids, and common mistakes. https://fasteyeglasses.com/blog/what-do-the-numbers-on-glasses-mean/https://fasteyeglasses.com/blog/what-do-the-numbers-on-glasses-mean/Thu, 01 Oct 2026 08:00:00 -0400Those numbers inside your glasses arm (like 52□18-140) are lens width, bridge width and temple length. Learn how to use them to find frames that fit when ordering online. https://fasteyeglasses.com/blog/single-vision-vs-bifocal-vs-progressive/https://fasteyeglasses.com/blog/single-vision-vs-bifocal-vs-progressive/Thu, 01 Oct 2026 08:00:00 -0400The difference between single vision, bifocal and progressive lenses, who each is for, and how to tell from your prescription which lens type you need. https://fasteyeglasses.com/blog/how-long-is-an-eyeglass-prescription-good-for/https://fasteyeglasses.com/blog/how-long-is-an-eyeglass-prescription-good-for/Thu, 01 Oct 2026 08:00:00 -0400Eyeglass prescriptions commonly expire after one to two years, depending on state law and your eye doctor. Where to find the date, why it expires and your right to a copy. https://fasteyeglasses.com/blog/can-you-use-contact-prescription-for-glasses/https://fasteyeglasses.com/blog/can-you-use-contact-prescription-for-glasses/Thu, 01 Oct 2026 08:00:00 -0400Contact lens and eyeglass prescriptions aren't interchangeable. Why the numbers differ, what's on each, and how to get your eyeglass prescription. https://fasteyeglasses.com/blog/how-to-buy-prescription-glasses-online/https://fasteyeglasses.com/blog/how-to-buy-prescription-glasses-online/Thu, 01 Oct 2026 08:00:00 -0400A step-by-step guide to buying prescription glasses online: what you need, how to pick a size and shape, entering your Rx and PD, and what to check before you pay. https://fasteyeglasses.com/blog/astigmatism-on-your-prescription/https://fasteyeglasses.com/blog/astigmatism-on-your-prescription/Thu, 01 Oct 2026 08:00:00 -0400Astigmatism shows up as CYL and Axis on your eyeglass prescription. What it is, how the numbers work, and whether you can order glasses online with astigmatism. https://fasteyeglasses.com/blog/kids-glasses-guide/https://fasteyeglasses.com/blog/kids-glasses-guide/Thu, 01 Oct 2026 08:00:00 -0400A parent's guide to kids' prescription glasses: sizing, fit, measuring a child's PD, frame materials, colors and tips for getting kids to actually wear their glasses. https://fasteyeglasses.com/blog/prescription-safety-glasses-guide/https://fasteyeglasses.com/blog/prescription-safety-glasses-guide/Thu, 01 Oct 2026 08:00:00 -0400What makes prescription safety glasses different from regular glasses: ANSI Z87.1 ratings, side shields, wrap frames, and how to check what your workplace requires. https://fasteyeglasses.com/blog/cheap-prescription-glasses-what-to-look-for/https://fasteyeglasses.com/blog/cheap-prescription-glasses-what-to-look-for/Thu, 01 Oct 2026 08:00:00 -0400How to find cheap prescription glasses online that are actually good: what the price should include, hidden add-on fees, frame sizing, prescription checks and secure payment.