Original Ray-Ban RB3637 replacement lenses
Bring your Ray-Ban RB3637 sunglasses back to life without buying a new frame. These original Ray-Ban replacement lenses restore the look and optical performance of your sunglasses while helping you save money compared with purchasing a complete new pair. Free shipping on qualifying orders.
Model compatibility
These lenses are made for the Ray-Ban RB3637 model. They should not be treated as universal round Ray-Ban lenses, because the fit depends on the exact frame code, Phantos shape, Base 4 curve and lens size.
If your frame is a replica, we cannot guarantee fitting. Original Ray-Ban lenses are cut for official Ray-Ban dimensions, and even a small difference in the metal rim can cause movement or prevent installation.
How to identify your model and size
Check the inside of the temple arm before ordering. You should find RB3637 followed by the lens size. This product is available in sizes 47, 50 and 53.
If the marking has worn away, measure the widest point of your old lens in millimetres or the inner opening of the rim. The right size matters: a 50 lens will not fit like a 53 lens.
Main features
- Brand: Ray-Ban
- Compatible model: RB3637
- Product type: original lenses
- Available sizes: 47, 50 and 53
- Shape: Phantos
- Lens curve: Base 4
- Use: sunglasses
- Audience: adult
- Associated frame material: metal
- Available diameters: 53 mm and 56 mm
- UV400 protection: blocks 100% UVA/UVB rays
Available colours
- 31 – Green – Crystal
- 33 – Brown uniform – Crystal
- 3F – Blue gradient – Crystal
- 51 – Brown light gradient – Crystal
- G1 – Green mirror blue – Crystal
- G3 – Polar clear gradient dark grey – Crystal
- G4 – Polar clear gradient dark green – Crystal
Material, protection and lens finishes
The options listed as Crystal are original Ray-Ban glass lenses. They keep the feel, weight and optical clarity expected from an official replacement. All versions provide UV400 protection for safe everyday sun use.
If you want polarised lenses, select a lens option that explicitly says Polar, such as G3 or G4. On original Ray-Ban polarised lenses, the logo may appear as Ray-Ban P.
Why replace only the lenses
The Ray-Ban RB3637 metal frame is built to last. If the bridge, rims and temples are still in good condition, replacing only the lenses is the smartest way to make your sunglasses look new again.
You also reduce waste by keeping a quality frame in use. At ReplacementLenses.net we work every day with original Ray-Ban lenses, and the right size gives the frame back its premium feel.
Authenticity and logo
We are an official EssilorLuxottica distributor. As original Ray-Ban lenses, they include the Ray-Ban logo; polarised versions may include the Ray-Ban P marking.
Each order is handled in our own optical workshop in Granada. Qualified opticians check lenses with a lensmeter, and we use professional MEI Easy Fit Trend equipment. Since 2018, we have repaired over 600,000 glasses and shipped more than 400,000 orders to over 50 countries.
Frequently asked questions
Will these fit Ray-Ban RB3447? We do not recommend using them for a different model. These lenses are specifically for Ray-Ban RB3637 and the rim geometry is model-dependent.
How do I choose between 47, 50 and 53? Look for the lens size printed inside the temple arm next to RB3637. If it is worn off, measure your old lens carefully in millimetres.
Are they original or compatible lenses? They are original Ray-Ban lenses, not generic compatible parts. That is why they keep the Ray-Ban logo and the correct RB3637 fit.
Do they provide real sun protection? Yes, they offer UV400 protection, blocking 100% UVA/UVB rays. This is essential for sunglasses used in strong daylight.
Are polarised options available? Yes, only the lens options marked Polar: G3 and G4. Choose one of those if polarisation is important to you.
Can I install them myself? The RB3637 is a metal frame, usually opened by a rim screw. If you are not used to this type of fitting, we recommend visiting an optician.
Example for guidance only. The position and order of the codes may vary depending on the frame.
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