Original Ray-Ban RB3670 Replacement Lenses

Original Ray-Ban RB3670 replacement lenses

Bring your Ray-Ban RB3670 sunglasses back to their original look and optical performance without buying a new frame. These original Ray-Ban replacement lenses are a smart, sustainable repair option and can cost up to 60% less than replacing the complete sunglasses. Free shipping is included, with the support of our own optical workshop in Granada.

Model compatibility

These lenses are made for Ray-Ban RB3670 in size 54. They are original replacement lenses for the genuine Ray-Ban metal frame, so the model and size must match to ensure a clean, secure fit.

Do not use them for other Ray-Ban double-bridge models that only look similar, or for replica frames. Small differences in lens shape, diameter or Base 6 curvature can prevent the lens from seating correctly.

How to identify your model and size

Check the inside of the temple arm. You should find the model code RB3670 together with the lens size; for this product, the compatible size is 54. The bridge measurement, if shown, does not replace the lens size when choosing replacement lenses.

If the wrong size is ordered, the lens may not fit the rim correctly. When in doubt, compare the engraving on your frame or measure your current lenses before ordering.

Main features

• Brand: Ray-Ban
• Compatible model: RB3670
• Size: 54
• Diameter: 58mm
• Shape: square
• Lens material: crystal glass
• Lens curve: Base 6
• Compatible frame material: metal
• Use: sunglasses
• Adult model
• Product type: original
• Protection: UV400, blocks 100% UVA/UVB

Available lens options

• 31 – Green – Crystal
• 32 – Grey gradient – Crystal
• 3F – Blue gradient – Crystal
• 51 – Light brown gradient – Crystal
• R5 – Grey – Crystal

Material, protection and lens finishes

These RB3670 lenses are made of crystal glass. The Base 6 curve preserves the correct optical geometry for this Ray-Ban metal frame and helps maintain the original feel of the sunglasses.

All listed lens options provide UV400 protection. If you are looking for a polarised version, the selected option must be clearly marked as polarised; only the lens options listed above apply to this product.

Why replace only the lenses

The Ray-Ban RB3670 metal frame is built to last, while lenses are the part most exposed to scratches, drops and daily wear. Replacing only the lenses lets you keep the frame that already fits your face, reduce waste and save significantly compared with buying new sunglasses.

You can also browse more original Ray-Ban lenses for other models.

Authenticity and logo

We are an official EssilorLuxottica distributor, so these are original Ray-Ban lenses. Original Ray-Ban lenses include the Ray-Ban logo, keeping your RB3670 looking authentic after the repair.

In our Granada workshop, qualified opticians check lenses with a lensmeter and work with professional MEI Easy Fit Trend equipment. Since 2018, we have repaired over 600,000 glasses and processed more than 400,000 orders in over 50 countries.

Frequently asked questions

Will these lenses fit my Ray-Ban RB3670?
They fit Ray-Ban RB3670 size 54. Always check the code engraved inside your temple arm before ordering.

Where can I find the size?
The lens size is usually engraved on the inner temple, next to RB3670. For this item, the required size is 54.

Can I install them in a replica frame?
These lenses are designed for original Ray-Ban frames. Replica frames may have different rim geometry, so fit cannot be guaranteed.

Are they glass or plastic?
These lenses are crystal glass, as stated in the product attributes. That helps preserve the original optical feel of the RB3670.

Do they protect against UV rays?
Yes, they feature UV400 protection, blocking 100% UVA and UVB. This is essential for real sunglass performance.

Can I fit them at home?
The RB3670 is a metal frame and usually requires loosening the rim screw. If you are not used to optical screws, we recommend professional installation.