Original Ray-Ban RB3691 Replacement Lenses

Original Ray-Ban RB3691 replacement lenses

If your Ray-Ban RB3691 frame is still in good condition but the lenses are scratched, replacing only the lenses is the smart way to bring your sunglasses back to life. These original Ray-Ban replacement lenses keep the correct fit, look and optical quality of the model, with free shipping and savings of up to 60% compared with buying a complete new pair.

Compatibility with the model

These lenses are original replacements for Ray-Ban 3691 / RB3691. They are designed for the Phantos shape and Base 6 curve of this specific model, so they should not be used as generic lenses for other Ray-Ban frames that only look similar.

How to identify your model and size

Check the inside of the temple arm. You should see the RB3691 reference and the lens size printed next to it. For this product, the available sizes are 51 and 48. Choosing the correct size is essential: the wrong lens may not fit into the rim or may sit loose.

Main features

• Brand: Ray-Ban
• Model: RB3691 / 3691
• Product type: original
• Use: sunglasses
• Audience: adult
• Shape: Phantos
• Lens curve: Base 6
• Lens material: glass
• Diameter: 54 mm
• Available sizes: 51 and 48
• UV400 protection: blocks 100% UVA/UVB

Available colours

• 31 – Green – Glass
• 33 – Brown uniform – Glass
• S2 – Polar blue – Glass
• B1 – Dark grey – Glass
• P1 – Polar dark green – Glass

If you want polarized lenses, choose only an option clearly marked as Polar, such as S2 – Polar blue – Glass or P1 – Polar dark green – Glass.

Material, protection and lens options

These Ray-Ban RB3691 lenses are made of glass, a material valued for its optical clarity and good scratch resistance. All listed options provide UV400 protection. The polarized lens options help reduce annoying glare while driving, near water or on reflective surfaces.

Why replace only the lenses

The RB3691 frame is worth keeping when it is still structurally sound. Replacing only the lenses allows you to preserve your original frame, reduce unnecessary waste and avoid the cost of a complete new pair. In many cases, the result feels like wearing new sunglasses again.

Authenticity and logo

We are an official EssilorLuxottica distributor and supply original Ray-Ban lenses. As original Ray-Ban lenses, they include the Ray-Ban logo; polarized versions feature the Ray-Ban P marking. In our own optical workshop in Granada, qualified opticians check every lens with a lensmeter before shipping.

Frequently asked questions

Will these fit any similar round Ray-Ban frame?
No. These lenses are made for Ray-Ban RB3691 and must match your frame size. Similar-looking models can have different bevels, shapes or curves.

How do I know whether I need size 51 or 48?
Look inside the temple arm, beside the RB3691 model code. The lens size printed there should match the size you order.

Are these genuine Ray-Ban lenses?
Yes. They are original Ray-Ban lenses supplied through the official EssilorLuxottica channel, so they preserve the authentic brand markings and optical quality.

Are they glass or plastic?
These RB3691 lenses are glass. Glass offers excellent visual clarity and strong scratch resistance.

Are polarized options available?
Yes, only the options marked Polar: S2 – Polar blue – Glass and P1 – Polar dark green – Glass. Select one of those if glare reduction is your priority.

Can I install them at home?
The RB3691 frame must be handled carefully when opening and closing the rim. If you are not used to small optical screws, we recommend professional installation.

Why are they cheaper than new sunglasses?
You are buying the lenses only, not a full frame and complete sunglasses package. That is why you can restore your original Ray-Ban for much less.