Yes, you can successfully buy progressive glasses online — but only if you have three accurate measurements beyond your basic prescription: your pupillary distance (PD), your fitting height (also called segment height), and your frame dimensions. Get these right and online progressives work just as well as those dispensed in a store.
What Makes Progressive Lenses Different From Single-Vision Lenses?
Progressive lenses have three distinct optical zones blended seamlessly into one lens: distance vision at the top, intermediate vision in the middle, and near vision at the bottom. Because there is no visible line, they look like regular lenses. However, this design means that even a small measurement error can shift the reading zone away from your natural line of sight, causing blurry vision or eye strain.
Which Measurements Do You Actually Need?
1. Pupillary Distance (PD)
PD is the distance in millimetres between the centres of your pupils. For progressives, a dual PD (one measurement per eye, e.g. 31 mm / 33 mm) is more accurate than a single combined number. Many optometrists in India include PD on the prescription slip; if yours did not, ask them to measure it, or use a trusted digital PD tool.
2. Fitting Height (Segment Height)
This is the vertical distance from the bottom of the lens to the centre of your pupil when you are looking straight ahead and wearing the chosen frame. It tells the lab exactly where to position the progressive corridor. This measurement is frame-specific, meaning it changes if you change your frame, so it cannot be taken until you have selected a frame.
3. Frame Dimensions
Not every frame can accommodate a progressive lens. You need a minimum lens height of roughly 28–30 mm to fit a full progressive corridor. Very narrow or heavily wrapped frames are generally not suitable. Always check the frame's listed lens height before you order.
How to Get Your Fitting Height When Buying Online
This is the trickiest part of ordering progressives online. The most reliable options are: visit a local optician with your chosen frame details so they can measure you in person; use a retailer that offers a virtual fitting or at-home try-on service; or, if you currently wear glasses, ask your optician to use your existing frame as a reference point. Some online retailers will also calculate a default fitting height if you send them a photograph taken at eye level — check whether Rimloo's customer support team offers this service before you order.
Single Vision vs Progressive Lenses Online: Key Differences
Single-vision lenses are forgiving of small PD errors because the whole lens is ground to one power. Progressive lenses are not. A 1–2 mm error in PD or fitting height can push the reading zone far enough that you have to tilt your head unnaturally to read. This is why first-time progressive buyers should take extra care — or start with an in-person fitting before moving online for future pairs.
Tips for a Successful Online Progressive Order
Ask your eye doctor for a dual PD measurement every time you get your eyes tested. Choose frames with a lens height of at least 30 mm. Provide your fitting height rather than letting the lab estimate it. Opt for a retailer with a clear remake or return policy specifically for progressives. Keep your old pair until your new one is confirmed correct.
