Eyeglass Frame Size Numbers Explained: Kathmandu Fitting Guide
- Eyeglass Frame Size Numbers Explained: Kathmandu Fitting Guide
- What does 52 □ 18 – 140 mean?
- Why identical size numbers can fit differently
- Five practical fit checks
- Frame size for higher prescriptions
- Frame measurements for progressive lenses
- Guide for tourists, expats and digital nomads in Kathmandu
- Why choose Vision Concern for frame fitting?
- Visit a Vision Concern branch
- Find genuine branch profiles and reviews
- Frequently asked questions
- Get help choosing a comfortable frame
- Shop Relevant Products
- Get a complete glasses quote before you choose
Numbers such as 52 □ 18 – 140 are a useful starting point when comparing eyeglass frames. This guide explains lens width, bridge width and temple length, why identical numbers can still fit differently, and when professional measurements matter for comfortable prescription glasses in Kathmandu.
In Kathmandu and worried about your eyes?
Book an eye exam (NPR 400 ≈ US$3) with our English-speaking optometrists in Lazimpat, Boudha or Makalbari — exams by appointment; optical shops open daily 8 AM – 8:30 PM. Card & cash accepted.
Replies within minutes or tap to call. Frame availability and suitability can be confirmed only after review.
What does 52 □ 18 – 140 mean?
Most frame markings use millimetres. In the example 52 □ 18 – 140, 52 is usually the width of one lens opening, 18 is the bridge width, and 140 is the temple length. The small square separates lens and bridge measurements. Some manufacturers print the numbers in a different order or add a model name, colour code, lens height or frame code.
| Example | Measurement | What it describes | Why it matters |
|---|---|---|---|
| 52 mm | Lens width | Horizontal width of one lens opening | Influences overall frame width and lens size |
| 18 mm | Bridge width | Distance across the bridge area | Affects how the frame rests on the nose |
| 140 mm | Temple length | Length of the side arm | Affects the position and bend behind the ear |
A previous frame that fits well can provide a helpful reference, but it should not be treated as a complete prescription for the next frame. For practical help choosing prescription glasses in Kathmandu, professional fitting remains important.
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Why identical size numbers can fit differently
Two frames marked 52–18–140 may feel very different. Lens shape, rim thickness, hinge position, curvature, nose-pad design, material flexibility and temple angle all affect the final fit. A round 52 mm lens and a rectangular 52 mm lens also distribute width differently across the face.
Bridge numbers are especially easy to misinterpret because a moulded plastic bridge and adjustable nose pads do not sit on the nose in the same way. Face width, nose shape and the position of the ears matter alongside the printed measurements.
Five practical fit checks
- Bridge: the frame should rest securely without painful pressure or repeated slipping.
- Overall width: the temples should not be forced outward, and the frame should not feel excessively loose.
- Eye position: your pupils should sit in an appropriate part of the lens openings for the selected lens design.
- Temple length: the sides should reach the ears and bend comfortably without lifting the frame.
- Clearance: eyelashes should not brush the lenses, and the lower rim should not press uncomfortably on the cheeks.
Replies within minutes or call now to describe the issue before travelling.
Frame size for higher prescriptions
For some higher prescriptions, a smaller and well-centred frame may help reduce unnecessary lens thickness and weight. The result also depends on prescription strength, pupillary distance, lens material, frame shape and lens design. A frame should therefore be selected together with suitable lens advice rather than from size numbers alone.
Vision Concern offers guidance on high-index ultra-thin prescription lenses. No thickness or cosmetic result can be guaranteed before the prescription, measurements, frame and lens specifications are reviewed.
Frame measurements for progressive lenses
Progressive lenses require more than the numbers printed on a frame. The frame must sit naturally before monocular pupillary distance, fitting height and other dispensing measurements are taken. Lens depth, frame position and the selected progressive design can affect the usable viewing zones.
If you are considering multifocals, review Vision Concern’s progressive lenses in Kathmandu. Bring your current pair and prescription when possible so the optometry and optical team can understand your previous experience.
Send your prescription and current-frame photo on WhatsApp
Replies within minutes or tap to call. Final recommendations require professional assessment.
Guide for tourists, expats and digital nomads in Kathmandu
Travellers can save time by photographing both the spectacle prescription and the numbers printed inside the temple before visiting. Include a front-facing photo of the current glasses if you want the team to understand their general shape and fit. Do not rely only on an online frame-size chart when ordering prescription lenses, especially if you use progressives, prism, a high prescription or an unfamiliar frame style.
Visitors may also find these resources useful: eye care for tourists and expats and using a foreign eyeglass prescription in Nepal. Availability and completion time depend on the frame, prescription, lens design, coatings, measurements and current supply.
Why choose Vision Concern for frame fitting?
Frame and lens decisions are reviewed together rather than relying on printed size alone.
Lazimpat, Boudha-Tushal and Makalbari provide convenient access.
Vision Concern states its ISO certification, International Opticians Association affiliation and 2018 patient-service award.
Published by: Yadav Raut, Consultant Optometrist, M.Optom–Norway
Reviewed by: Shreena Prajapati
Visit a Vision Concern branch
| Branch | Location | Phone |
|---|---|---|
| Lazimpat | Das Tower, near Radisson Hotel | 01-4543117 |
| Boudha-Tushal | Opposite KFC, Boudha | 01-4562303 |
| Makalbari | Pragati Chowk, Gokarneshwor | 01-5134042 |
Find genuine branch profiles and reviews
Google: Boudha · Lazimpat · Makalbari
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Frequently asked questions
Get help choosing a comfortable frame
Send your frame numbers and prescription before visiting, or contact the nearest branch. Suitability, stock and completion time are confirmed only after review.
WhatsApp +9779841466716Replies within minutes Tap to Call
Shop Relevant Products
Ready to compare suitable options? View the related Vision Concern products below. Prescription and contact-lens suitability should be confirmed professionally.
In Kathmandu and worried about your eyes?
Book an eye exam (NPR 400 ≈ US$3) with our English-speaking optometrists in Lazimpat, Boudha or Makalbari — exams by appointment; optical shops open daily 8 AM – 8:30 PM. Card & cash accepted.
Get a complete glasses quote before you choose
Share your prescription and the way you use your glasses. Vision Concern can confirm suitable frame and lens options, with an itemised quote and expected collection timing, so you can make your purchase with the details in hand.
Visiting Nepal or comparing with a quote in your home country? Send the same product specification and quantity. Compare the complete Nepal quote in NPR, including fitting and any applicable delivery, currency-conversion or customs costs. Confirm availability and timing against your travel dates before paying.
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Yes. Many visitors, particularly from Bangladesh and West Bengal (Kolkata), come to Nepal for cataract, retina, or other eye surgery at a hospital and also want new glasses, a general eye exam, or contact lenses at the same time, before or after their procedure. Vision Concern is an optical and eye-examination clinic, not a surgical hospital, so we work alongside hospitals such as Tilganga: we are happy to see you for glasses, contact lenses, or a routine check-up either side of your surgical treatment elsewhere.
No conversion is needed. Eyeglass prescriptions from Germany, France, the UK, the USA, China, Russia, and almost every other country use the same international format, SPH (sphere), CYL (cylinder), and AXIS, measured in diopters. Our opticians read this directly, so you can bring your prescription paper, a photo of it on your phone, or simply your current glasses, and we will use the same values. If your prescription is more than a year or two old, we recommend a quick, free re-check before we make your new pair.
Yes. Above roughly 3,000 metres, UV exposure increases sharply because of the thinner atmosphere and reflection off snow, and ordinary sunglasses (category 2-3) do not block enough UV to prevent snow blindness (photokeratitis). We recommend glacier glasses or category-4 sunglasses with side shields, and can fit these with your own prescription if needed. Vision Concern offers ZEISS polarized, UV400-certified sunglasses with prescription lenses, which we can prepare before you set off on your trek.