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Certified EssilorLuxottica distributor An international benchmark for Ray-Ban and Oakley replacement parts Over 600,000 glasses restored in 50+ countries New High-precision custom engraving on your lenses 3-year warranty on all replacement parts Compatible Quality and savings to renew your glasses Certified EssilorLuxottica distributor An international benchmark for Ray-Ban and Oakley replacement parts Over 600,000 glasses restored in 50+ countries New High-precision custom engraving on your lenses 3-year warranty on all replacement parts Compatible Quality and savings to renew your glasses

All Ray-Ban replacement lenses →All original Ray-Ban lenses →

Original product Original lenses Ray-Ban RB4451
Ray-Ban

Original Ray-Ban RB4451 lenses

Bring your Ray-Ban RB4451 glasses back to life with a pair of original lenses, made for this model and bearing the original logo.

Complete pair Glass lens Original logo
$ 57.96 from · price per pair
Select the lens sizeChoose your lens size
Choose the color and coatingChoose a color

Material: Mineral glass

Optional
Your configurationOriginal lenses RB4451
$ 57.96 per pair
Model
Ray-Ban RB4451
Material
Mineral glass
Product
Original pair · with Ray-Ban logo
Choose the options to see availability
Quantity: 1 Total $ 57.96
3-year warrantyOn all replacement parts
Check the model and lens size. 50 and 53 mm lenses are not interchangeable. This pair is only for the Ray-Ban RB4451.
Before you choose

Find the right lens size for your RB4451

The inscription on the inside of the arm lets you confirm the model and exact lens measurement without visually comparing frames.

Inscription on the inside of the arm: RB4451 ··· 50□·· 145Example for guidance only. The position and order of the codes may vary depending on the frame.

How to read the inscription

In an inscription such as RB4451 ··· 50□·· 145, each part has a purpose:

RB4451ModelMust match this product.
···Frame colorIdentifies the finish of the frame front.
50Lens sizeThis is the size you need to select.
··BridgeThis is not the lens size.

This reference comes in 2 sizes. Find the number right before the □ symbol on your arm and choose that same lens size:

  • 50□ → 50 mm
  • 53□ → 53 mm

The number after the □ is the bridge: it isn't used to choose the lens. Can't read it? Measure your lens from side to side at its widest point; that measurement in millimeters matches the lens size.

Product and model

Ray-Ban RB4451

Frame material of the RB4451: Nylon. This pair of original lenses keeps the shape, thickness, beveling and fit designed for this frame; you just need to confirm that the reference and lens size match.

Reference
RB4451
Available lens sizes
50 and 53 mm
Identification
Original logo
MaterialGlass lens
Compatible frameNylon
Packaging1 pair
ManufacturingOriginal Ray-Ban
Product contents

What you'll receive with your order

1Original right lens with Ray-Ban logo
2Original left lens with RB engraving
3Selected color, coating and lens size
CristalesRepuesto technician checking a lens in the Granada workshop
Specialists since 2018Original product with specialist support
Why choose ReplacementLenses

Origin, compatibility and contents explained before you buy

We work with original replacement parts and help you confirm the model and lens size to reduce mistakes before we prepare your order.

EssilorLuxottica Ray-Ban Certified distributor
since 2018
Certified distributor

ReplacementLenses has been a certified EssilorLuxottica distributor since 2018.

Verifiable original

Ray-Ban pair with the original markings for the variant.

Guided compatibility

We explain where to find RB4451 and how to tell the 50 and 53 mm lens sizes apart.

3-year warranty

Coverage against manufacturing defects and after-sales support.

Meet our team Check compatibility
Installation guide

How to replace the lenses on your RB4451

This model has a dedicated guide: follow the method shown in the video for your frame.

Guide specific to the RB4451Step-by-step installation
ReplacementLenses · YouTube
More information

Everything about this replacement part for the Ray-Ban RB4451

Restore Your Ray-Ban RB4451 with Original Replacement Lenses

Bring your Ray-Ban RB4451 sunglasses back to life with these official replacement lenses. Manufactured and distributed by Ray-Ban/Luxottica, each lens features the authentic RB logo, ensuring genuine quality, perfect fit, and full UV protection. Choose original parts to maintain the integrity, comfort, and iconic look of your Ray-Ban frames.

With these lenses, your Ray-Ban RB4451 regains its original clarity and style. Don’t compromise on vision or design—only official Ray-Ban replacements guarantee compatibility and premium finish.

Technical Specifications and Materials

  • Compatibility: Designed exclusively for Ray-Ban RB4451 frames.
  • Available sizes: 50 mm and 53 mm diameter.
  • Lens height: 44 mm and 46 mm depending on size.
  • Available lens colors:
    • 31 – Green crystal
    • 58 – Green polarized crystal
    • B1 – Dark grey crystal
    • 71 – Grey gradient crystal
    • R5 – Blue crystal
    • 33 – Brown crystal
    • 51 – Brown light gradient crystal
  • Lens material: High-quality mineral crystal (as per original reference).
  • Shape: Irregular, tailored for RB4451.
  • Use: Sun protection for adults.
  • Product type: Official Ray-Ban replacement, not compatible or generic.
  • Original frame info: Nylon front and metal temples (for reference, not included).

How to Check Your Model and Size

To ensure compatibility, check the inside of your Ray-Ban temple arm:

  • Find the model code: should read “RB4451”.
  • Identify the size: usually shown next to the model (e.g., 50 or 53).
  • Check the color code: often appears after the size and identifies the exact lens tone.
  • Confirm all details before ordering to guarantee a perfect fit.
Original Ray-Ban RB4451 Replacement Lenses | Official Parts
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We answer your questions

FAQ

Are these identical to the lenses my sunglasses came with?

Yes, these are original Ray-Ban/Luxottica replacements, made to official standards. Minor updates in materials or tints may occur depending on variant or production year, always within the official range.

What exactly is included in my order?

Your order includes one pair of original Ray-Ban RB4451 lenses. The frame and accessories are not included.

Are they guaranteed authentic?

We guarantee you will receive authentic Ray-Ban replacement parts, officially distributed by the manufacturer.

Explore our full range of original Ray-Ban replacement parts.

You can also browse all our original Ray-Ban lenses available for other models.

Is the price for one lens or for the pair?

The price is for a complete pair: original Ray-Ban right and left lenses.

Can I choose a different color from the original?

Yes. You can choose another available variant as long as you select the RB4451 model and the exact lens size of your frame.

How do I know if I need 50 or 53 mm?

Look for the reference on the inside of the arm. In an inscription such as RB4451 ··· 50□··, the number 50 is the lens size.

Are all colors available in all lens sizes?

Not necessarily. Final availability depends on the lens size and the color and coating combination: when you choose a lens size, you'll only see the colors that exist for it.

Do the polarized versions have a logo?

Yes. On polarized variants, the marking may appear as Ray-Ban P, in addition to the discreet RB engraving.

Will they fit another similar model?

No. Shape doesn't determine compatibility: these lenses are only for reference RB4451 and the lens size you choose.

Search by reference

Find your glasses' reference

Look on the inside of one of the temple arms. That's where you'll find the details needed to find the right replacement part.

Inside of a Ray-Ban temple arm showing reference RB2140, color 901, lens size 50, bridge 22 and arm length 150
RB2140Frame model
901Color code
50Lens size
22Bridge width
150Arm length
●

To find lenses: the model and lens size are usually enough. For arms: we also recommend checking the color and length.