Single vision
One correction across the whole lens — for distance, or for reading, not both.
- Impact-resistant polycarbonate
- Anti-scratch hard coat
- 100% UVA/UVB block
- Prescriptions to ±6.00 SPH
- Cut in 5 business days
$0already in the frame price
Fit &
lens guide
Three numbers decide whether a frame fits. Four more decide what goes in it. None of them are complicated once someone writes them down in plain language — so here they are.
Measuring · 4 steps
Face shapes · 4 profiles
Lenses · 3 types, 5 coatings
Prescriptions · every abbreviation
Step one
The three numbers
The three numbers
inside your temple
Every pair of glasses ever made carries its own size, printed on the inside of the arm. Read it off the pair you already own and you have your size.
- 52 mmLens width — across one lens at its widest. Drives how big the frame reads on your face.
- 18 mmBridge — the gap between the lenses. Too narrow pinches; too wide slides down.
- 140 mmTemple — hinge to ear tip. This is the number that decides comfort behind the ear.
- 41 mmLens height — top to bottom. Matters for progressives, which need depth for the reading zone.
- 01 Find the print on the arm Open a pair you own and look on the inside of the left temple, near the hinge. You'll see something like 52□18-140.
- 02 Read it left to right Lens width, bridge, temple — always in that order, always in millimetres. The little square between the first two is the industry mark for "bridge".
- 03 No print? Measure the total width Lay the frame face down and measure hinge to hinge across the front. Under 130 mm is narrow, 130–139 medium, 140 mm and over wide.
- 04 Stay within ±2 mm A frame within two millimetres of your current lens width will sit where you're used to. Beyond four, it will feel like a different pair.
Still guessing? Don't.
Five frames, seven days, no charge and a prepaid return label in the box. Measuring gets you to a shortlist; your own mirror settles it.
Build a try-on box
Step two
Face shape is a
Face shape is a
contrast decision
The working rule opticians use: pick a frame whose geometry opposes your face's. Angles against curves, curves against angles. It's a starting point, not a law.
Round
Width and length are similar, the jaw is soft, and the widest point is the cheeks.
- Square and rectangular frames
- Browline — the heavy top bar adds structure
- Angular cat-eye for lift
Square
Strong jawline, broad forehead, roughly equal width across brow and jaw.
- Round and oval frames
- Aviators — the curved base softens the jaw
- Thin metal rims over heavy acetate
Oval
Balanced proportions, slightly longer than wide, with a gently rounded jaw.
- Almost any shape works
- Match frame width to face width
- Use colour and material to make the call
Heart
Wide forehead and cheekbones tapering to a narrower chin.
- Round and aviator shapes
- Rimless and bottom-heavy frames
- Keep the brow line light and low
One caveat worth saying out loud: face-shape charts are styling advice, not optics. Plenty of people look best in the "wrong" shape. Fit — the three millimetre numbers above — is the part that actually has to be right.
Step three
Choosing
Choosing
a lens
Single-vision lenses with anti-scratch and UV coating are in every frame price on this site. Everything below is an upgrade, priced once, in plain numbers.
Progressive
Distance at the top, reading at the bottom, with a gradual corridor between them and no visible line.
- Free-form digital surfacing
- Widened corridor for narrow frames
- Anti-glare coating included
- Needs 30 mm+ of lens height
- Non-adapt refund within 60 days
+$185per pair
Sun & polarised
Your prescription in a tinted lens. Polarisation cancels glare bouncing off flat surfaces — water, snow, road.
- Solid or gradient tint
- Optional polarising filter
- Mirror finishes available
- Same 100% UV block as clear
- Available in most frames
+$60per pair
| Add-on | What it does | Worth it if | Price |
|---|---|---|---|
| Anti-reflective | Cuts reflections off both lens faces, so more light reaches your eye and fewer people see glare on your glasses. | You drive at night or appear on camera. | +$25 |
| Blue-light filter | Absorbs part of the 415–455 nm band. Bundled with our anti-reflective stack. | You want it — comfort reports vary and the evidence is mixed. | Included with AR |
| High-index 1.67 | Bends light more sharply, so a strong correction can be ground thinner and lighter. | Your SPH is beyond about ±4.00. | +$45 |
| Photochromic | Darkens in UV light and clears indoors. Reacts less behind a windscreen, which blocks UV. | You want one pair for indoors and out. | +$80 |
| Oleophobic top coat | Sheds fingerprints and skin oil so the lens wipes clean in one pass. | You clean your glasses more than twice a day. | +$15 |
Step four
Reading your
Reading your
prescription
A spectacle prescription is a small grid of abbreviations. Here is what each one means, so you can check the numbers you type into a checkout box are the numbers on your paper.
Spectacle Rx
Example only
| Eye | SPH | CYL | AXIS | ADD |
|---|---|---|---|---|
| OD (right) | −2.25 | −0.75 | 180 | +1.75 |
| OS (left) | −2.50 | −0.50 | 175 | +1.75 |
PD 63 mm · binocular
A demonstration prescription printed to show the layout. It is not a prescription for anyone, and it is not medical advice — only your own eye-care professional can issue yours.
-
OD / OS
Which eye
Latin: oculus dexter is the right eye, oculus sinister the left. Some prescriptions simply print "R" and "L", and OU means both.
-
SPH
Sphere — the main correction
Lens power in dioptres. A minus number corrects short-sightedness (distance is blurred), a plus number long-sightedness. The further from zero, the stronger the lens.
-
CYL
Cylinder — astigmatism
Extra power for an eye whose surface curves more in one direction than another. Blank or "DS" means there's none to correct.
-
AXIS
Where the cylinder sits
An angle from 1 to 180 degrees telling the lab which orientation the cylinder correction goes in. It only appears when there's a CYL value.
-
ADD
Reading addition
Extra plus power for close work, added to the lower part of a progressive or bifocal. Usually the same in both eyes.
-
PD
Pupillary distance
Millimetres between the centres of your pupils — it tells the lab where to place the optical centre of each lens. Typically 54–74 mm in adults.
-
PRISM / BASE
Alignment correction
Shifts the image to help eyes that don't align together. Most prescriptions never carry one; if yours does, tell us before ordering.
Two things we can't do for you. We can't tell you what your prescription should be, and we can't examine your eyes. Sight tests also check eye health, which is why they matter beyond the numbers.
Prescriptions expire — commonly after one to two years, depending on where you live and who issued it. If yours has lapsed, book an eye exam with a local optometrist or ophthalmologist. We'll hold your basket while you do.
Afterwards
Care, returns
Back to all frames →
Care, returns
& warranty
How should I clean the lenses?
Rinse under lukewarm water first — dry-wiping grit is what puts the fine scratches in a
lens. Then a drop of dish soap, rinse, and dry with the microfibre cloth in the case.
Skip paper towels, shirt hems and anything alcohol-based, which strips the coatings.
My frames have gone crooked. Can you fix them?
Yes, free, forever. Acetate relaxes with body heat and metal takes a set — both are normal
after a few months. Walk into any Lunet studio or mail them in and we'll re-align them at
no cost. Please don't bend them back yourself at the hinge.
What does the two-year warranty actually cover?
Two years from delivery, any cause. Snapped temple, failed hinge, lens coating lifting,
sat on in the car — we repair or replace and don't ask you to explain. It covers the
frame and lenses as sold; it doesn't cover a lens re-cut because your prescription changed.
What if I don't get on with progressives?
Most people adapt in one to two weeks as the brain learns where the corridor sits. If
you're still fighting them after that, our non-adapt policy refunds the progressive
upgrade within 60 days and we'll re-cut single-vision lenses into the same frame.
Can I return glasses made to my prescription?
Yes — 30 days, free return shipping, prescription lenses included. If the fit is the
problem rather than the frame, contact us first: nine times out of ten an adjustment
fixes it and you keep the glasses you chose.
Will my insurance or HSA cover this?
HSA and FSA cards work at checkout. For vision insurance we're an out-of-network
provider, so you pay us and claim back — we generate the itemised receipt pre-filled.
See how reimbursement works →
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