INVU M4216 Round Clip-On Eyeglasses
On orders over Dhs 500
Most of our frames are “one size,” designed to fit a wide range of faces. A few styles come in multiple sizes. Use your current glasses as the best reference, or follow the quick steps below.
1) How to read frame size (on your glasses)
Look inside the temple (arm). You’ll see numbers like: 52□18–140
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52 = Lens width (mm)
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18 = Bridge width (mm)
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140 = Temple length (mm)
Match these to the new frame for the most reliable fit.
2) Quick fit by face width (no glasses handy?)
Use a ruler (millimeters) across your face at the pupils, or try the “credit-card test” (a card is ~54 mm wide).
| Face width | Typical lens width | Typical bridge | Temple length |
|---|---|---|---|
| Narrow | 48–51 mm | 15–18 mm | 135–140 mm |
| Medium | 52–54 mm | 16–19 mm | 140–145 mm |
| Wide | 55–57 mm | 17–21 mm | 145–150 mm |
Tip: Sunglasses often run 1–2 mm larger than optical frames for a comfortable, slightly looser fit.
3) One-size frames—how to choose
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Compare the listed size to your current frame stamp (e.g., if you wear 52□18–140, look for something close: 51–53 lens, 17–19 bridge, 140–145 temple).
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If between sizes, pick slightly larger for sunglasses and closer match for optical.
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Small adjustments (nose pads, temple bend) by an optician can fine-tune the fit.
4) What each number changes
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Lens width: overall frame width/coverage.
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Bridge: comfort on the nose; higher bridge = more space.
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Temple length: behind-ear comfort; longer temples for larger heads or if temples feel tight/short.
5) Common size examples
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Optical (unisex): 50–54 / 17–19 / 140–145
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Sunglasses (unisex): 52–56 / 16–20 / 140–150
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Smaller faces: start at lens width 48–50
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Larger faces: look at 55–57
6) Still unsure?
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Match your current frame numbers first.
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Check our product photos on model notes (if available).
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You can message us your current size (e.g., 52□18–140) and preferred fit (snug/standard/relaxed)—we’ll suggest options.
INVU
Swiss group, Ultra Polarized
Founded in Zürich in 2013 and owned outright by Swiss Eyewear Group. A lens-technology-led brand rather than a fashion licence: its named lens construction, Ultra Polarized, is a nine-layer build.
Est. 2013
Product details
- ShapeRound
- Size
The INVU M4216 Clip-On is a round eyeglass frame for men and women. It comes with demo lenses, so you can add single-vision, progressive, reading or non-prescription lenses when you order. Available in 2 colourways: C and A.
The INVU M4216 is a round optical frame supplied with a matching clip-on sun lens. Wear it as prescription glasses indoors, then add the clip to turn it into sunglasses for the drive or the beach, without carrying a second pair.
- Frame: round front, unisex fit
- Frame colours: Tortoise, Black
- Includes: optical frame with a matching clip-on sun lens
Every frame can be fitted with single vision, progressive, blue light filter or photochromic lenses made to your prescription; the clip sits over your prescription lenses.
Shop the authentic INVU M4216 at OptiVision UAE, with delivery across Dubai and the UAE. See more clip-on glasses.
Frame
- Model code
- M4216
- Brand
- Invu
- Designed for
- Unisex
- Frame shape
- Round
Lenses
- Lens colour
- Polarised
- Photochromic
Colour & size
- Frame colour
- Tortoise
- Colour code
- C
- Size
- Size band
Delivery & pickup
- Lens craftingPrescription and custom lenses take 1–3 working days to make before dispatch.
- Free UAE deliveryAll emirates, 1–2 working days after dispatch — usually 2–5 working days in total.
- 4-hour expressNot available on orders with prescription or custom lenses.
- Collect in storeFrom Dubai Festival City, Ibn Battuta Mall, Outlet Mall and Festival Plaza. Find a branch
Returns & exchanges
- 7-day returnsUnworn, in the original packaging, with the OptiVision tag still attached.
- 14-day exchangesSame conditions — swap at any of our branches.
- Made-to-order lensesFrames ordered with prescription or custom lenses are final sale.
Warranty & what's included
- 1-year warrantyManufacturer warranty against manufacturing defects. Keep the warranty card from the box.
- Lifetime aftercareFree, unlimited cleaning and adjustments at any of our branches.
In the box
- Original packaging
- Hard case or soft pouch
- Cleaning cloth
- Warranty card
Contents can vary slightly by brand.
Payment options
- CardsCredit and debit cards, processed by Network International.
- WalletsApple Pay, Google Pay and Samsung Pay.
- TabbySplit into 4 interest-free payments.
- Cash on deliveryPay when your order arrives.
What is Ultra Polarized?
INVU's named lens construction — a nine-layer build whose stated layers include the ultra polariser, a colour-enhancement layer, an impact-resistant flexible layer and a hard anti-scratch coat.
Who owns INVU?
Swiss Eyewear Group (International) AG, based in Zürich. INVU was founded in 2013 and is owned outright rather than licensed from a fashion house.
Why is INVU cheaper than the designer brands?
There is no licence fee in the price and the brand avoids celebrity and campaign spend, positioning on price-to-specification instead.
What does the range cover?
Women's, men's, sports and kids sunglasses; optical frames including magnetic clip-on versions; Easyfit sun-clip styles; and reading and computer glasses. It is broad for the price tier.
Can INVU frames be glazed to prescription?
The optical range is made for prescription lenses, and clip-on and Easyfit styles pair a sun clip with a prescription frame. Our opticians will confirm the combination before ordering.
Are these frames authentic?
Yes. INVU frames are sourced through authorised supply and arrive with their case and manufacturer documentation, with a one-year warranty against manufacturing defects.
