Frame Details

Lens Color: Demo glasses

Shape: Half-Rim

Frame Color: Grey

Frame Material: Stainless Steel

Lens Width:

Bridge:

Temple Length:

140

customer reviews content

52-17-140

52mm

17mm

140mm

Home Caterpillar Caterpillar CPO 3521

Caterpillar CPO 3521

25006899

Caterpillar CPO 3521

25006899

Sale price: $35.93 82% OFF

Regular price: ~~$194.70~~ Save $158.77

You save $158.77, 82 percent off the regular price.

Final Sale

Size Size Guide 52

Colors: 1 color

Frame: Grey

Lens Color: Demo glasses

Ships within 1-3 business days.

Frame Details

Customer Reviews

Authenticity Guaranteed

100% Authentic Products

Key features

What's included

With every hearing glasses purchase, a case and charging pad will already be included.

Premium quality lenses

Choose an additional filter that adjusts to your lifestyle.

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Need help?

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Caterpillar Caterpillar CPO 3521

Total

SELECT YOUR LENS TYPE

Choose the lens type that best matches your vision needs. Each option is designed to provide optimal clarity and comfort for different viewing distances and activities.

Single Vision

Lenses with one consistent prescription for either near or distance vision.

Distance, Reading, Computer

Bifocal/Progressive

Lenses with multiple focal points for both near and distance vision.

Distance, Reading, Computer

Non-prescription

Lenses without vision correction, for fashion or eye protection only.

Fashion Lenses, Blue Light, Sunglasses

ENTER YOUR PRESCRIPTION

Choose how you want to add your prescription

Manually Fill in your prescription details manually.

Upload RX Upload it here and skip most of the form above - only PD (Pupillary Distance) will still be required.

Take a Picture of Your RX Use your camera to snap a photo and skip most of the form above - only PD (Pupillary Distance) will still be required.

Send it later We will ask for your prescription after checkout.

ENTER YOUR PRESCRIPTION

Same prescription for both eyes

Right(OD)

Sphere (SPH)

Sphere (SPH) is the power of the lens in the horizontal direction.

Cylinder (CYL)

Cylinder (CYL) is the power of the lens in the vertical direction.

Axis (AXI)

Axis (AXI) is the angle of the lens in the horizontal direction.

Right(OD)

Plus

+0.0

+0.25

+0.5

+0.75

+1.0

+1.25

+1.5

+1.75

+2.0

+2.25

+2.5

+2.75

+3.0

+3.25

+3.5

+3.75

+4.0

+4.25

+4.5

+4.75

+5.0

+5.25

+5.5

+5.75

+6.0

+6.25

+6.5

+6.75

+7.0

+7.25

+7.5

+7.75

+8.0

+8.25

+8.5

+8.75

+9.0

+9.25

+9.5

+9.75

+10.0

+10.25

+10.5

+10.75

+11.0

+11.25

+11.5

+11.75

+12.0

+12.25

+12.5

+12.75

+13.0

+13.25

+13.5

+13.75

+14.0

+14.25

+14.5

+14.75

+15.0

+15.25

+15.5

+15.75

+16.0

+16.25

+16.5

+16.75

+17.0

+17.25

+17.5

+17.75

+18.0

+18.25

+18.5

+18.75

+19.0

+19.25

+19.5

+19.75

+20.0

+20.25

+20.5

+20.75

+21.0

+21.25

+21.5

+21.75

+22.0

+22.25

+22.5

+22.75

+23.0

+23.25

+23.5

+23.75

+24.0

+24.25

+24.5

+24.75

+25.0

+25.25

+25.5

+25.75

+26.0

+26.25

+26.5

+26.75

+27.0

+27.25

+27.5

+27.75

+28.0

+28.25

+28.5

+28.75

+29.0

+29.25

+29.5

+29.75

+30.0

Minus

-0.0

-0.25

-0.5

-0.75

-1.0

-1.25

-1.5

-1.75

-2.0

-2.25

-2.5

-2.75

-3.0

-3.25

-3.5

-3.75

-4.0

-4.25

-4.5

-4.75

-5.0

-5.25

-5.5

-5.75

-6.0

-6.25

-6.5

-6.75

-7.0

-7.25

-7.5

-7.75

-8.0

-8.25

-8.5

-8.75

-9.0

-9.25

-9.5

-9.75

-10.0

-10.25

-10.5

-10.75

-11.0

-11.25

-11.5

-11.75

-12.0

-12.25

-12.5

-12.75

-13.0

-13.25

-13.5

-13.75

-14.0

-14.25

-14.5

-14.75

-15.0

-15.25

-15.5

-15.75

-16.0

-16.25

-16.5

-16.75

-17.0

-17.25

-17.5

-17.75

-18.0

-18.25

-18.5

-18.75

-19.0

-19.25

-19.5

-19.75

-20.0

-20.25

-20.5

-20.75

-21.0

-21.25

-21.5

-21.75

-22.0

-22.25

-22.5

-22.75

-23.0

-23.25

-23.5

-23.75

-24.0

-24.25

-24.5

-24.75

-25.0

-25.25

-25.5

-25.75

-26.0

-26.25

-26.5

-26.75

-27.0

-27.25

-27.5

-27.75

-28.0

-28.25

-28.5

-28.75

-29.0

-29.25

-29.5

-29.75

-30.0

Plus

+0.25

+0.5

+0.75

+1.0

+1.25

+1.5

+1.75

+2.0

+2.25

+2.5

+2.75

+3.0

+3.25

+3.5

+3.75

+4.0

+4.25

+4.5

+4.75

+5.0

+5.25

+5.5

+5.75

+6.0

Minus

-0.25

-0.5

-0.75

-1.0

-1.25

-1.5

-1.75

-2.0

-2.25

-2.5

-2.75

-3.0

-3.25

-3.5

-3.75

-4.0

-4.25

-4.5

-4.75

-5.0

-5.25

-5.5

-5.75

-6.0

Left(OS)

Sphere (SPH)

Cylinder (CYL)

Axis (AXI)

Left(OS)

Plus

+0.0

+0.25

+0.5

+0.75

+1.0

+1.25

+1.5

+1.75

+2.0

+2.25

+2.5

+2.75

+3.0

+3.25

+3.5

+3.75

+4.0

+4.25

+4.5

+4.75

+5.0

+5.25

+5.5

+5.75

+6.0

+6.25

+6.5

+6.75

+7.0

+7.25

+7.5

+7.75

+8.0

+8.25

+8.5

+8.75

+9.0

+9.25

+9.5

+9.75

+10.0

+10.25

+10.5

+10.75

+11.0

+11.25

+11.5

+11.75

+12.0

+12.25

+12.5

+12.75

+13.0

+13.25

+13.5

+13.75

+14.0

+14.25

+14.5

+14.75

+15.0

+15.25

+15.5

+15.75

+16.0

+16.25

+16.5

+16.75

+17.0

+17.25

+17.5

+17.75

+18.0

+18.25

+18.5

+18.75

+19.0

+19.25

+19.5

+19.75

+20.0

+20.25

+20.5

+20.75

+21.0

+21.25

+21.5

+21.75

+22.0

+22.25

+22.5

+22.75

+23.0

+23.25

+23.5

+23.75

+24.0

+24.25

+24.5

+24.75

+25.0

+25.25

+25.5

+25.75

+26.0

+26.25

+26.5

+26.75

+27.0

+27.25

+27.5

+27.75

+28.0

+28.25

+28.5

+28.75

+29.0

+29.25

+29.5

+29.75

+30.0

Minus

-0.0

-0.25

-0.5

-0.75

-1.0

-1.25

-1.5

-1.75

-2.0

-2.25

-2.5

-2.75

-3.0

-3.25

-3.5

-3.75

-4.0

-4.25

-4.5

-4.75

-5.0

-5.25

-5.5

-5.75

-6.0

-6.25

-6.5

-6.75

-7.0

-7.25

-7.5

-7.75

-8.0

-8.25

-8.5

-8.75

-9.0

-9.25

-9.5

-9.75

-10.0

-10.25

-10.5

-10.75

-11.0

-11.25

-11.5

-11.75

-12.0

-12.25

-12.5

-12.75

-13.0

-13.25

-13.5

-13.75

-14.0

-14.25

-14.5

-14.75

-15.0

-15.25

-15.5

-15.75

-16.0

-16.25

-16.5

-16.75

-17.0

-17.25

-17.5

-17.75

-18.0

-18.25

-18.5

-18.75

-19.0

-19.25

-19.5

-19.75

-20.0

-20.25

-20.5

-20.75

-21.0

-21.25

-21.5

-21.75

-22.0

-22.25

-22.5

-22.75

-23.0

-23.25

-23.5

-23.75

-24.0

-24.25

-24.5

-24.75

-25.0

-25.25

-25.5

-25.75

-26.0

-26.25

-26.5

-26.75

-27.0

-27.25

-27.5

-27.75

-28.0

-28.25

-28.5

-28.75

-29.0

-29.25

-29.5

-29.75

-30.0

Plus

+0.25

+0.5

+0.75

+1.0

+1.25

+1.5

+1.75

+2.0

+2.25

+2.5

+2.75

+3.0

+3.25

+3.5

+3.75

+4.0

+4.25

+4.5

+4.75

+5.0

+5.25

+5.5

+5.75

+6.0

Minus

-0.25

-0.5

-0.75

-1.0

-1.25

-1.5

-1.75

-2.0

-2.25

-2.5

-2.75

-3.0

-3.25

-3.5

-3.75

-4.0

-4.25

-4.5

-4.75

-5.0

-5.25

-5.5

-5.75

-6.0

Addition (ADD)

Addition (ADD) is the power of the lens in the horizontal direction.

PD is the distance between the center of the pupil and the center of the lens.

PD Right (OD)

PD Left (OS)

Split PD

How to measure your PD Tap for step-by-step help—or use Measure PD below to measure automatically.

Add Prism $19

Vertical (Δ)

Base Direction

Horizontal (Δ)

Base Direction

OD (Right Eye)

OS (Left Eye)

Upload RX (Optional)

Have a copy of your RX? Upload a PDF or photo here and skip most of the form above - only PD (Pupillary Distance) will still be required.

Upload your RX

For best results:

Place prescription on a flat surface
Make sure all corners are visible
Avoid glare and blurry images

Uploading...

RX uploaded successfully!

RX Document name.pdf

Upload failed. Please try again.

RX UPLOADED SUCCESSFULLY!

Your prescription has been successfully uploaded.

RX Document name.pdf

SELECT THE LENS MATERIAL (REQUIRED)

Select the right lens material based on your lifestyle and prescription needs. Thinner, lighter, or more impact-resistant options help enhance comfort, durability, and clarity.

Premium Standard Plastic $30.00

High Quality, Distortion Free Lenses

Impact Resistant Polycarbonate $59.00

30% Thinner than Plastic

1,67 High-Index $79.00

Thinner for strong prescriptions

1.74 High-Index $159.00

Ultra-Thin, best for high prescriptions

SELECT THE LENS TYPE (REQUIRED)

Choose between Bifocal or Progressive lenses based on your vision needs.

Bifocal $0.00

Standard Progressive $0.00

SELECT ANTI-REFLECTIVE COATING

Reduces glare and enhances clarity, ideal for driving and bright environments.

Standard Anti Reflective $29.99

Diffuses light reflections and adds a water resistant layer for reduced fogging and easier cleaning.

Premium Anti - Reflective Crizal Sapphire $129.00

Crizal Sapphire offers the highest level of glare reduction as well as the latest anti-scratch, oil, water and static technology. The most durable AR coating available.

Anti-Reflective with Blue-Light Protection

Standard Blue Light Blocking AR $49.00

BlueShield blue-light blocking reflects 20% of all harmful blue light away, while allowing beneficial blue light in. This AR coating differs from a traditional AR coating in that it will have a noticeable blue hue.

Premium Anti-Reflective Blue-Light Protection Crizal Prevencia $139.00

Discover the power of Crizal Prevencia lenses – your ultimate solution for crystal-clear, protected vision. Shielding your eyes from harmful UV rays, blue-violet light, and glare, these lenses ensure a healthier, more comfortable visual experience. Upgrade your eyewear today for unparalleled eye protection and exceptional clarity.

Continue without Anti-Reflective Coating

SELECT THE LENS COLOR (REQUIRED)

Customize your lenses with color options that match your lifestyle - whether you want clear everyday vision, adaptive photochromic comfort, or glare-cutting outdoor performance. Each option enhances comfort, clarity, and protection in different lighting environments.

Clear $0.00

1 COLORS: Clear

Transition Gen S $110.00

Experience ultra-fast light adaptation with vibrant style. These next-gen photochromic lenses darken in seconds, fade back quickly indoors, and provide 100% UV protection with advanced blue light filtering. Available in 8 dynamic colors for all-day comfort and clarity.

1 COLORS: Grey

Transition extra active $149.00

Designed for extra light-sensitive eyes, these lenses darken more than standard Transitions—even behind the windshield. They offer a slight indoor tint, block 100% UV, and filter blue light for enhanced comfort in all lighting conditions. Ideal for active, light-intense lifestyles.

1 COLORS: Grey

Polarized $89.00

Designed to reduce glare from reflective surfaces like water, roads, and glass, polarized lenses enhance visual clarity and comfort in bright conditions. They improve contrast, reduce eye strain, and provide 100% UV protection—perfect for driving, outdoor sports, and everyday sunwear.

1 COLORS: Grey

Tint $29.00

Tinted lenses reduce brightness and glare by filtering light, offering enhanced visual comfort in sunny or bright environments. Available in various colors and shades, they can improve contrast, support specific activities, and add a stylish look while providing UV protection.

6 COLORS: Grey

Tint Darkness: 80%

You've selected clear lenses (with sunglass frames) - continue?

CUSTOMIZE TINT DARKNESS

Adjust the tint darkness level to your preference for optimal comfort and visibility.

Tint $29.00

6 Colors: Grey

Tint Darkness: 80%

REVIEW & CONFIRM

Review your selections before adding to cart.

Frame:

$35.93

Caterpillar CPO 3521

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Frame Details

Lens Width:

Bridge:

Temple Length:

customer reviews content

Caterpillar CPO 3521

Caterpillar CPO 3521

Key features

What's included

Premium quality lenses

You might also like

SELECT YOUR LENS TYPE

ENTER YOUR PRESCRIPTION

ENTER YOUR PRESCRIPTION

Upload RX (Optional)

RX UPLOADED SUCCESSFULLY!

SELECT THE LENS MATERIAL (REQUIRED)

SELECT THE LENS TYPE (REQUIRED)

SELECT ANTI-REFLECTIVE COATING

SELECT THE LENS COLOR (REQUIRED)

CUSTOMIZE TINT DARKNESS

REVIEW & CONFIRM

Frame:

Lenses:

Prescription:

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