Complete Guide
How do you choose a frame that lasts?
Size, face shape and material, considered together with your prescription
Face shape, material, sizing and fit — choosing a frame is about more than looks; it also decides whether your lenses can perform. Optometrist YoYo explains it from aesthetics to optics, all in one place.
- ✦The order of choosing: filter for "fit" first (width aligned to your face, nose pads snug, height enough for your lens needs), then pick the "good-looking" ones from among those that fit.
- ✦Matching a frame to a face usually works better by "contrast" than by "similarity": a round face suits an angular frame to sharpen the outline, a square face suits a rounder frame to soften the lines.
- ✦Weight, the metals that touch your skin, and how easily the frame can be adjusted later all come down to material.
- ✦A frame is a carrier for the lens: high myopia needs a small frame, progressives need enough frame height, and personalized custom lenses need the frame curve and pantoscopic tilt confirmed first.
Matching a frame to your face: the contrast principle
The core idea in one line: a frame's lines usually look better "contrasting" with your face shape than "matching" it. A rounder face suits a slightly angular frame to sharpen the outline; a squarer face suits a rounder frame to soften the lines.
| Face shape | Recommended frames | Avoid |
|---|---|---|
| Round | Square, aviator and geometric frames — straight lines to firm up the outline | Large round frames, round rimless (reinforce roundness) |
| Square | Round, oval and cat-eye frames — soften the jawline | Hard-edged thick square frames (amplify angles) |
| Long | Thicker frames with more depth, darker frames — widen the face visually | Narrow, slim frames (lengthen the face) |
| Heart (wide forehead, pointed chin) | Frames rounder at the bottom, thin frames, rimless, cat-eye — balance a wide top and narrow base | Top-heavy thick frames, aviators (make the forehead look wider) |
| Oval | Most frame shapes suit; choose by facial proportion | Frames too large or too small that throw off balance |
Full face-shape selection principles: How to choose an eyeglass frame for your face shape: round, square and oval faces
How to choose material: the trade-offs of weight, durability and allergy
Material decides weight, adjustability and allergy risk — for people who wear glasses long hours, this affects the experience more than looks.
Acetate
Rich colour and texture, fine feel, adjustable curve — the mainstream for design pieces. Medium weight, with presence in thicker frames.
Pure Titanium / β-Titanium
Titanium is low-density and corrosion-resistant. Pure titanium contains no nickel, so the allergy risk is lower; beta titanium is an alloy with more spring than pure titanium. If your skin still reacts and it does not settle, see a dermatologist.
Metal (stainless steel / Monel)
Can be made very thin and is easy to adjust. Monel is a nickel-copper alloy and stainless steel often contains nickel, so if your skin reacts to metal, ask about the composition first.
TR90 Plastic-Steel
Light, flexible, impact-resistant — good for sport and children. Less adjustable, with a more casual feel.
Full material comparison table: How to choose eyeglass frame material? A full comparison of acetate, metal, titanium and TR90
Sizing and fit: slipping and pinching are both size problems
You'll often see a set of numbers on the inside of the temple, for example 52□18-140: lens width 52 mm, bridge width 18 mm, temple length 140 mm. Understanding it keeps you from mistakes when buying online or changing frames.
Three tests of fit: the total frame width aligns with your face width without extending past the temples; the bridge or nose pads sit stably and snugly, neither pressing nor slipping; the temple length curves naturally behind the ear, neither pinching nor loose.
And frame fit isn't just about comfort — a crooked frame or the wrong size shifts the lens's optical centre away from your pupils, directly affecting clarity, which is especially pronounced with progressives and strong prescriptions.
Read the size markings and fit principles: Glasses slipping or pinching? A full breakdown of frame sizing and fit
The hidden key to choosing a frame: the frame serves the lens
Lenses only work once they are in a frame. When you choose a frame, our licensed optometry staff look at your prescription and the lens you need first, then narrow down the frames.
High myopia needs a small frame →
The narrower the frame, the thinner and lighter the lens edge; when the distance between the two rim centres (lens width plus bridge) is far from your PD, the lens has to be cut off-centre and the outer edge gets thicker
Progressives need enough height →
Insufficient frame height cuts off the near zone, leaving you unable to find the clear reading position
Frame curve affects custom lenses →
Personalized custom lenses factor in the frame's pantoscopic tilt and curve, so these must be confirmed when choosing the frame
Fit precision affects the optical centre →
Only with the frame sitting straight and the nose pads and temples adjusted does the lens's optical centre land in the correct position over the pupils
Choosing frames: FAQ
Q: How long does a good frame last?
There is no fixed number of years; it depends on the material, how you wear it and how you store it. The frame's own signals tell you more than a date: the hinge screw keeps working loose and the thread no longer holds; the plating on a metal frame starts to peel, or an acetate frame turns cloudy and feels brittle; or the frame has bent and no longer returns to its original position however it is adjusted. Any of these means it is time to think about a new frame. A change in prescription, on the other hand, does not necessarily retire the frame.
Further reading: Is it worth replacing just the lenses in your old glasses? →Q: How do I choose a frame colour? Do skin tone and hair colour matter?
They matter, though there is no single right answer. Warm, slightly yellow skin tones usually sit well with tortoiseshell, amber and gold; cool, pinkish skin tones are easier to pair with black, grey, silver, clear or blue. Hair and eyebrow colour count too: with dark hair and brows, a thick dark frame gives strong contrast and a strong presence, while lighter hair suits light or translucent frames that do not take over the face. With a strong prescription, a thicker dark acetate frame can also hide part of the lens edge. When you have narrowed it down, take the frames to a window and check them once in daylight.
Q: I have a low nose bridge. What should I look for in a frame?
Start with what holds the frame on your nose. Most metal frames have adjustable nose pads whose height and spacing can be set, which makes a low bridge easier to fit. Most acetate frames have the nose pads moulded into the front; with a low bridge the frame sits lower, the bottom of the lens rests on your cheeks, and a smile pushes the glasses up. In that case look for acetate frames with higher moulded pads, or ones fitted with metal nose pads at the bridge. Watch your eyelashes as well: if the frame sits too low and the lens is too close to the eye, your lashes brush the lens when you blink. Smile and blink a few times during the try-on and you will know.
Q: If I want two pairs of glasses to alternate, can the frames be different?
Yes, but each frame has to be measured separately. The same prescription in two different frames sits at a different distance from your eyes, at a different forward tilt and at a different fitting height, so each frame is measured on your face and its lenses are made to its own numbers. If both pairs are progressives, both frames need enough height. Even when measured correctly, the two pairs may still feel slightly different; if one of them is hard to wear, bring it back for a check.
Further reading: Same prescription, so why do two pairs of glasses feel so different? →About the author and sources
YoYo (Cheng Chia-Yu), Optometrist
Optometrist License No. 003309 | Graduate of Yuanpei University of Medical Technology | Lecturer, New Taipei City Optometrists Association
Lead optometrist at Beyond Visual Optometry × BiYang Optometry Clinic, specializing in clinical vision exams, binocular vision assessment, progressive lens fitting and children's myopia tracking.
Meet Optometrist YoYo →
Sources
- ISO 8624:2020 Ophthalmic optics — Spectacle frames — Measuring system and vocabulary (boxed system for frame sizes)
- Fukui Optical Industry Association, JAPAN GLASSES FACTORY: about Fukui and Sabae (in Japanese)
- Monel (composition of the nickel-copper alloy)
- Beyond Visual: frame brands (dealer list and non-dealer note on luxury frames)
- Optometrists Act (Laws & Regulations Database of the ROC, in Chinese)
The 52□18-140 marking follows ISO 8624, and the background on Sabae comes from the Fukui Optical Industry Association. Monel contains nickel as part of the alloy itself. Which 12 frame brands we carry, which store has MINAMOTO, and which adjustments and repairs both stores handle were confirmed by our stores before being written here; whether a particular frame can be worked on is decided by an in-store assessment. Last updated: October 23, 2026.
Articles on choosing frames
Choosing a frame
How to Choose Glasses Frames for Your Face Shape: Round, Square, and Oval Faces | Beyond Visual Optometry
There's no single 'right' frame for your face shape — but there are principles. Master contrast, proportion, and face width, and you'll know exactly what you're looking for (and why) when you try frames on in person at our Xinzhuang or Banqiao store.
FramesWhy Do My Glasses Slide Down or Pinch? A Complete Guide to Frame Size and Fit | Beyond Visual Optometry
Glasses that slide down or pinch your temples usually aren't a 'face problem' — they're a frame-size problem. This guide teaches you to read the numbers printed on your temple arm and judge whether a frame actually fits, with real measurements available at our Xinzhuang and Banqiao stores.
FramesChoosing Glasses Frame Material: Acetate, Metal, Titanium & TR90 Compared | Beyond Visual Optometry
Choosing a frame material isn't just about looks — weight, allergies, and adjustability all matter, especially with your face and prescription. Here's a complete breakdown of acetate, metal, pure titanium, and TR90, all available to try on and compare in person at our Xinzhuang and Banqiao stores.
Rimless, luxury & sports frames
Rimless and Semi-Rimless Glasses: Pros, Cons, and Who They're Right For
Rimless glasses look light and clean, but they're not right for everyone. What's the difference with semi-rimless, and can they handle a high prescription? Beyond Visual Optometry (Xinzhuang and Banqiao) breaks it down from an optical and durability standpoint.
FramesCan You Put Prescription Lenses in Cartier or Chrome Hearts Frames? A Complete Guide to Luxury Frame Fitting and Repair
Want prescription lenses in your Cartier, Chrome Hearts, or Linda Farrow frames, but kept getting turned away? Here's why luxury frame fitting is hard, and where to get a screwless Lindberg frame repaired — Beyond Visual Optometry in Xinzhuang and Banqiao breaks it all down.
Brands, adjustment & repair
MINAMOTO: A Handcrafted Pure Titanium Eyewear Brand from Sabae, Japan | Beyond Visual Optometry Xinzhuang
Born in Sabae, Japan's legendary eyewear town — Japanese pure titanium construction, screwless design, and a handmade washi paper case. MINAMOTO is a brand made for people who appreciate detail.
FramesYour Glasses Aren't Really Fitted Until They're Adjusted — 8 Key Steps in Hand Frame Adjustment
Getting the prescription right doesn't mean your glasses are properly fitted. Half of whether a pair of glasses feels comfortable comes down to frame adjustment, and how carefully that step is done.
Kids' frames, re-lensing old frames and bringing your own frame
How to Choose Kids' Frames — Safety, Durability, and Fit: What Parents Should Actually Look For
A children's frame isn't just a shrunk-down version of an adult one. Material safety, impact resistance, and proper fit are the three things Xinzhuang and Banqiao parents should really be looking at when choosing glasses for their kids.
OptometryIs It Worth Replacing Just the Lenses in Your Old Glasses? When You Should Get a New Frame Instead | Beyond Visual Optometry
Your prescription changed, but the frame still feels right — is it worth just swapping the lenses? Sometimes yes, sometimes you're better off replacing the frame too. Here's an honest look at both sides: a frame in good shape is worth keeping, a worn-out or ill-fitting one isn't — we won't just push you toward buying new. Bring your old frame to Xinzhuang or Banqiao for an evaluation.
Complete GuideThe Complete Guide to Bring-Your-Own-Frame Lenses
Online-bought, old or luxury frames: how the fitting fee works and what we check before starting.
Have your eyes checked before you choose a frame
Our licensed optometry staff check your prescription first, ask how you use your eyes day to day, then try frames on with you one by one. Both our Xinzhuang and Banqiao stores take bookings; MINAMOTO is available to try at the Xinzhuang store.
Book a Vision Consultation →