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Saint Laurent SL M40-003 sunglasses - Black / Grey
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  • Saint Laurent SL M40-003 sunglasses - Black / Grey
  • Saint Laurent SL M40-001 sunglasses - Black / Black
Saint Laurent | SL M40

Saint Laurent | SL M40

£350.00
£350.00
Colour: Black / Grey
Size: 54-18-140
Will it fit you? Compare with your current glasses

Look inside the arm of your current glasses for three numbers, like 54□18-145. Enter them below.

A guide based on your current frame. Not sure? Our optometrist is happy to advise.

Transitions Gen S

Our most popular adaptive lens. Transitions Gen S darkens in sunlight and clears indoors — automatically, with no effort on your part. Available in 8 fashion colours.

IndoorsVirtually clear
OutdoorsUp to 90% dark
Fade back3–5 minutes
UV protection100% UV400
Colours8 options
Best forEveryday wear

Darkening behind a car windscreen is limited — see XTRACTIVE if you drive often.

Transitions XTRACTIVE

The performance upgrade. XTRACTIVE lenses go darker than Gen S, activate behind a car windscreen, and work in bright indoor light — ideal if you drive or are light-sensitive.

IndoorsSlight tint (comfort)
OutdoorsUp to 95% dark
DrivingActivates in car
UV protection100% UV400
ColoursGrey, Green, Brown
Best forDrivers & outdoors

Has a very slight tint indoors — this is normal and provides extra comfort in bright environments.

Customise your sunglasses

Choose an option to continue

MAR Anti-Reflection

A multi-layer coating that eliminates surface reflections from your lenses. Light passes through cleanly instead of bouncing back as glare — making your vision sharper and your lenses almost invisible to others.

WITHOUT MAR WITH MAR COATING ✗ Glare · Reflections ✓ Clear · Reflection-free
Night drivingCuts oncoming headlight glare
ScreensReduces monitor reflections
AppearanceLenses look nearly invisible
PhotosNo flash reflections in eyes
ClarityUp to 99% light transmission
IncludesScratch & smudge resistance

Recommended for almost everyone. If you wear your glasses full time, MAR is the single biggest upgrade you can make to your lenses.

Blue Filter Coating

Selectively filters high-energy blue-violet light (380–480nm) emitted by screens, LED lighting and the sun. This is the wavelength range most associated with digital eye strain and disrupted sleep.

LIGHT ENTERING YOUR EYES FILTERED OUT PASSES THROUGH 380–480nm · HEV blue light Linked to strain & sleep disruption Strain → Comfortable
Screen timeReduces fatigue from phones & monitors
SleepLess blue light in evenings
SensitivityHelps light-sensitive eyes
LED lightingFilters harsh artificial light
IncludesMAR anti-reflection layer
Best forOffice & heavy screen users

The Blue Filter coating includes a built-in anti-reflection layer, so you get the benefits of both coatings in one. Lenses have a very slight yellow-green tint which is normal and expected.

Varifocal Lenses

We want to make sure your varifocals are absolutely right for you. Accurate measurements are essential — a tiny error can make varifocals unwearable.

For that reason, we'd love to see you in person or speak with you directly before ordering varifocal lenses.

📧 sales@theeyecentre.com
📍 The Eye Centre, 56 High Street, Leicester, LE1 5YN

Sunglasses as Shown — Please Confirm

You'll receive these sunglasses complete with their original tinted lenses, exactly as displayed in the product photos.

No glazing or prescription fitting is included. If you'd like prescription or clear lenses fitted, please go back and choose another option.

👓

Prescription Outside Our Range

We're sorry — your prescription is outside the range we can currently dispense online.

📧 sales@theeyecentre.com
📍 The Eye Centre, 56 High Street, Leicester, LE1 5YN

Bold lines, timeless acetate elegance Sharp, modern style with Saint Laurent confidence

The Saint Laurent SL M40 brings confident, refined style to your everyday look. Expertly crafted from acetate, these women's sunglasses feature a sharp rectangle-square shape that frames the face with modern polish. Offered in a 54-18-140 size, they are an effortless way to elevate any outfit, from busy city days to relaxed weekends away.

Frame colour
black / grey — durable, lightweight, and refined
Rectangle / Square shape
Strong horizontal lines for a sharp, structured profile
Best for face shape
Round-Oval

Frame dimensions

Glasses frame dimensions Lens width 54mm, bridge 18mm, temple 140mm 54mm lens width 18 bridge 54mm lens width 140mm temple

Specifications

ColourBlack / Grey
Best forRound-Oval
Frame materialAcetate
ShapeRectangle / Square
Lens width54mm
FitStandard Fit
GenderWomen
Best forRound-Oval
Expert Optical Glazing
When ordered with a prescription, your lenses are manufactured and glazed by our specialist optical lab to your exact requirements — verified by our GOC-registered optometrist before dispatch.
Ordering with a prescription?
We review every prescription before manufacturing begins. If we have any questions we will contact you directly. Not sure which lenses to choose? Get in touch and we will guide you.

Same fit, different look

Fits like your SL M40

54 lens 18 bridge 140 arm
Exact fitGucci | GG1692SA

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GG1692SA

£270

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Same lens and bridge as the SL M40 — a different look that fits the same.
Exact fitGucci | GG2040S

Gucci

GG2040S

£350

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±1mmTom Ford | FT1216 (HAYLAY)

Tom Ford

FT1216 (HAYLAY)

£350.49

53-19-140

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