Ray-Ban 4323 Original Replacement Lenses

Original Ray-Ban RB4323 replacement lenses

If your Ray-Ban RB4323 frame still fits well, replacing only the lenses is the smart way to make your sunglasses feel new again. These original Ray-Ban lenses restore the factory look, vision and UV protection at a much lower cost than buying a full new pair, with free shipping and the confidence of purchasing from an official EssilorLuxottica distributor.

Compatibility with the model

These Ray-Ban replacement lenses are made for the Ray-Ban RB4323 in size 51. The square lens shape, Base 6 curve and 56 mm lens diameter are the key details for a precise fit. Do not rely only on visual similarity: nearby Ray-Ban references may look close but use a different lens geometry.

How to identify your model and size

Check the inside of the temple before ordering. You should find the RB4323 model reference and the 51 lens size printed on the frame. If your temple shows size 51 for the RB4323, these lenses are the matching replacement option.

Main features

• Brand: Ray-Ban.
• Compatible model: RB4323.
• Size: 51.
• Lens diameter: 56 mm.
• Shape: square.
• Lens curve: Base 6.
• Use: sunglasses.
• Audience: adult.
• Product type: original.
• Material: glass for variants marked CRYSTAL; plastic for variants marked PLASTIC.

Available colours

• 31 - Green - Crystal.
• 32 - Grey gradient - Crystal.
• 33 - Brown uniform - Crystal.
• 51 - Brown light gradient - Crystal.
• 71 - Grey blue gradient - Crystal.
• 93 - Yellow flash mirror - Crystal.
• 83 - Polarized brown - Plastic.
• 9A - Green polarized - Plastic.

Materials, protection and lens options

The CRYSTAL variants offer the classic optical feel of Ray-Ban glass lenses, with clear vision and strong everyday scratch resistance. The 83 and 9A options are marked PLASTIC and polarized, helping reduce glare from roads, water and shiny surfaces. All options provide UV400 protection, blocking 100% of UVA and UVB rays.

Why replace only the lenses

Most of the time, the RB4323 frame is still perfectly usable while the lenses are scratched or worn. Replacing the lenses can cost up to 60% less than buying a complete new pair, keeps the frame that already fits your face and is a more sustainable choice. You can also browse our full range of original Ray-Ban lenses.

Authenticity and logo

As original Ray-Ban lenses, they include the Ray-Ban logo; polarized variants are marked Ray-Ban P. At ReplacementLenses.net we are an official EssilorLuxottica distributor, with our own optical workshop in Granada and qualified opticians checking lenses with a lensmeter. Since 2018, we have repaired over 600,000 glasses and shipped more than 400,000 orders to over 50 countries.

Frequently asked questions

Are these lenses compatible with any Ray-Ban 4323?

They are made for the Ray-Ban RB4323 in size 51. Always check both the RB4323 reference and the 51 size on the inside of your temple before ordering.

Can I use them on an RB4323-V optical frame?

We recommend these lenses only for the RB4323 sunglasses reference listed here. Optical frames can have different grooves, thicknesses or fitting tolerances even when the shape looks similar.

How do I know if the size is correct?

Look for the lens size printed inside the temple. For this product, the key number is 51; if your frame shows another size, do not force the lenses into place.

Are they genuine Ray-Ban lenses?

Yes, these are original Ray-Ban lenses, not third-party compatible lenses. That is why they keep the Ray-Ban branding and, on polarized 83 and 9A options, the Ray-Ban P marking.

Do they protect against UV rays?

Yes, these replacement lenses include UV400 protection, blocking 100% of UVA and UVB rays. This is essential for safe, comfortable sunglass use.

Can I install them myself?

The RB4323 uses a plastic/nylon frame and lenses are usually pressure-fitted with care. If you feel too much resistance or have no experience, we recommend visiting an optician.

Which options are polarized?

Only the variants specifically marked polarized are polarized: 83 - POLARIZED BROWN - PLASTIC and 9A - GREEN POLARIZED - PLASTIC. These versions include the Ray-Ban P marking.