How to read the inscription
In an inscription such as RB4201 ··· 59□·· ···, each part has a purpose:
All Ray-Ban replacement lenses →All original Ray-Ban lenses →
Bring your Alex back to life with a pair of original Ray-Ban lenses, made for the RB4201 model and bearing the original logo.
The inscription on the inside of the arm lets you confirm the model and exact lens measurement without visually comparing frames.
In an inscription such as RB4201 ··· 59□·· ···, each part has a purpose:
Frame material of the RB4201: 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.
We work with original replacement parts and help you confirm the model and lens size to reduce mistakes before we prepare your order.
ReplacementLenses has been a certified EssilorLuxottica distributor since 2018.
Ray-Ban pair with the original markings for the variant.
We explain where to find RB4201 and how to tell the 59 mm lens sizes apart.
Coverage against manufacturing defects and after-sales support.
This model has a dedicated guide: follow the method shown in the video for your frame.
Bring your Ray-Ban RB4201 sunglasses back to clear vision without buying a complete new frame. These original Ray-Ban replacement lenses are a smart way to renew your sunglasses for less, with free shipping on qualifying orders and the support of a specialist optical workshop.
At ReplacementLenses.net we handle Ray-Ban lenses every day in our own workshop in Granada. We are an official EssilorLuxottica distributor, and qualified opticians check every lens with a lensmeter before dispatch.
These lenses are made for the Ray-Ban RB4201 model in size 59. They are designed to fit the original Ray-Ban frame for this exact model, respecting the lens shape, Base 6 curve and factory look.
Do not use them for other Ray-Ban models that only look similar. Even small differences in shape or curvature can prevent a secure and accurate fit.
Check the inside of the temple arm. On an original Ray-Ban frame you should find the model reference, usually shown as RB4201, followed by sizing information. For this replacement, the key details are RB4201 and lens size 59.
If the print on your temple has worn off, compare the lens shape carefully and verify any remaining frame markings before ordering. A correct model match is essential for a safe installation.
Choose the lens colour that matches your original sunglasses to keep the same Ray-Ban RB4201 style. Both gradient lens options are ideal for everyday sun use and a refined look.
These lenses are made from polycarbonate, a lightweight and resistant material widely used in sunglasses. The Base 6 curvature helps maintain the correct optical geometry for the RB4201 frame.
UV400 protection blocks 100% of UVA and UVB rays. This is especially important when replacing sunglass lenses: a dark tint alone does not guarantee real eye protection unless the lens is properly certified.
If your frame is still comfortable, replacing only the lenses is the most efficient way to restore your sunglasses. You can save money compared with buying a complete new pair, while keeping the frame that already fits your face.
It is also a more sustainable choice. With more than 600,000 glasses repaired, over 400,000 orders and customers in 50+ countries since 2018, we know that a new set of original lenses can make your favourite sunglasses feel new again.
As original Ray-Ban lenses, they include the Ray-Ban logo used on genuine products. Buying original Ray-Ban lenses helps ensure proper fit, UV protection and optical quality.
We are an official EssilorLuxottica distributor. Our opticians inspect each lens with a lensmeter before shipping, so your replacement reaches you ready for a precise installation.
Are these lenses compatible with any Ray-Ban RB4201?
They are intended for Ray-Ban RB4201 in size 59. If your frame is a different model, even a similar-looking one, the lens shape may not fit correctly.
Can I use them in other Ray-Ban frames?
No. Ray-Ban models can look close in photos, but the lens cut and curve are model-specific.
How do I know my size is 59?
Look inside the temple arm for the model and size markings. If your frame shows RB4201 and size 59, this is the correct replacement.
Can I install them myself?
If you have experience, you may install them carefully. For plastic-type frames, gentle heat can help, but if the lens does not seat easily, stop and visit an optician.
Are they genuine Ray-Ban lenses?
Yes. This is an original Ray-Ban product and includes the Ray-Ban logo corresponding to genuine lenses.
Do they protect against UV?
Yes. These sunglass lenses provide UV400 protection, blocking 100% of UVA and UVB rays.
Are they polarised?
Only choose a variant marked as polarised when that option is available. The lens options listed here are 13 brown gradient and 8G grey gradient.

Ratings posted by customers for the Ray-Ban RB4201 Alex. We show the most recent ones.
“Buena experiencia lentes ALEX”
Published reviewThe price is for a complete pair: original Ray-Ban right and left lenses.
Yes. You can choose another available variant as long as you select the RB4201 model and the exact lens size of your frame.
Yes. On polarized variants, the marking may appear as Ray-Ban P, in addition to the discreet RB engraving.
No. Shape doesn't determine compatibility: these lenses are only for reference RB4201 and the lens size you choose.
Your review of Ray-Ban RB4201 Alex