Ray-Ban 4640 Original Replacement Lenses

Original Ray-Ban RB4640 replacement lenses

Bring your Ray-Ban RB4640 sunglasses back to clear, sharp vision without buying a new frame. These original Ray-Ban 4640 replacement lenses are official sun lenses with free shipping and can save you up to 60% compared with replacing the complete sunglasses.

Model compatibility

These lenses are made for the Ray-Ban RB4640 model. For a safe fit, your frame must match the 4640 reference and the correct size. Similar-looking Ray-Ban frames are not interchangeable, because small differences in lens shape, bevel and curve can make the lens too loose or too tight.

How to identify your model and size

Check the inside of the temple arm. You should find the model reference, usually shown as RB4640 or 4640, followed by sizing numbers. The lens size for this product is 50. If your frame reads 4640 50, this is the replacement you need.

Main features

• Product type: original Ray-Ban lenses.
• Compatible model: Ray-Ban RB4640 / 4640.
• Size: 50.
• Lens diameter: 53 mm.
• Shape: square.
• Lens material: glass.
• Lens curve: Base 6.
• Use: sunglasses.
• Audience: adult.
• Associated temple material: nylon.

Available colours

• 31 - green - glass.
• 33 - brown uniform - glass.
• 71 - grey blue gradient - glass.
• M2 - brown gradient polarized - glass.
• M3 - grey blue gradient polarized - glass.
• 3M - blue gradient - glass.

Material, protection and lens finishes

These RB4640 lenses are made of glass and follow the Base 6 curve of the model. They are sun lenses with UV400 protection, blocking 100% of UVA and UVB rays. If you want extra comfort against glare, choose one of the lens options clearly marked as polarized, such as M2 or M3.

Why replace only the lenses

If your frame is still in good condition, replacing only the lenses is the smart choice. You keep the sunglasses you already like, recover clear vision and reduce unnecessary waste. ReplacementLenses.net has repaired more than 600,000 glasses since 2018, with over 400,000 orders shipped to more than 50 countries.

Authenticity and logo

Because these are original Ray-Ban lenses, they include the Ray-Ban logo; polarized versions carry the Ray-Ban P marking. We are an official EssilorLuxottica distributor, and every lens is checked in our own optical workshop in Granada by qualified opticians using a lensmeter. You can also browse more original Ray-Ban lenses for other models.

Frequently asked questions

Will these fit similar Ray-Ban models?
No. These replacement lenses are specifically for the Ray-Ban RB4640. Even a very similar frame may have a different groove or curve, so the fit would not be reliable.

How do I confirm the correct size?
Look inside the temple arm for RB4640 or 4640 and the size number. If the frame shows size 50, choose this RB4640 size 50 replacement.

Are they genuine Ray-Ban lenses?
Yes. They are original Ray-Ban lenses supplied through the official EssilorLuxottica channel, with Ray-Ban branding and Ray-Ban P on polarized lens options.

Can I upgrade to polarized lenses?
Yes, as long as you choose a RB4640 lens option that is listed as polarized. The key point is that model and size match your frame.

What are the lenses made of?
These Ray-Ban RB4640 lenses are made of glass. This keeps the optical feel and character of the original sun lenses.

Can I install them myself?
If you have experience, you can fit them carefully. If the frame feels too tight, we recommend visiting an optician to avoid damaging the frame or lens.