Barret-Outdoor square fullrim polarized prescription sunglasses
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How to find PD?
Shipping fee & Time
Shipping Fee (Specifically refers to US Dollar)：
|
Shipping Method |
Shipping Time |
Cost |
|
Standard shipping |
10-15 business days |
$3.9 (Free on orders over $69) |
|
Advanced shipping |
6-10 business days |
$8.9 (Free on orders over $129) |
|
Fast shipping |
3-6 business days |
$36.9 |
Note:
A complete reference for the shipping policy page is as follows:
Shipping Policy
Is duty free?
Fast Shipping does not include taxes. For details, please contact our customer service email for a more comprehensive response.
Lens index guide
Lens Index measures how efficiently light bends through the prescription lens. The higher a lens' index is, the thinner it becomes.
Quick Reference Chart
| Index | SPH Range | Thickness | Weight | Price |
| 1.56 | 0~±2.00 | Thickest | Heaviest | $ |
| 1.61 | 0~±4.00 | Moderate | Moderate | $$ |
| 1.67 | ±2.00~±6.00 | Thin | Light | $$$ |
| 1.74 | ±4.00+ | Thinnest | Lightest | $$$$ |
1.56 Index (Standard)
- Best for: Low prescriptions | SPH Range: 0~±2.00.
- Pros: Affordable, widely available.
- Cons: Thicker edges for stronger prescriptions; not recommended for sports sunglasses. It's the heaviest, not recommended for those who require comfort.
1.61 Index (Mid-Range)
- Best for: Mild to moderate prescriptions | SPH Range: 0~±4.00.
- Pros: Around 20-30% thinner than 1.56, good clarity. It's slightly lighter.
- Cons: Slightly more expensive.
1.67 Index (Thin & Light)
- Best for: Moderate to high prescriptions | SPH Range: ±2.00~±6.00.
- Pros: Around 40% thinner than 1.56, lightweight.
- Cons: Higher cost.
1.74 Index (Thinner)
- Best for: High prescriptions | SPH Range: ±4.00 and above.
- Pros: Thinnest option (around 50% thinner than 1.56). In terms of weight, it is the lightest and most comfortable.
- Cons: Most expensive.
Additional Tips
- Frame Size Matters: Larger frames make lenses appear thicker - opt for higher index(1.67/1.74) if needed.
- Ask Your Optician: For astigmatism (CYL) or bifocals, they may recommend adjustments.
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We are committed to providing you with the perfect visual health solutions，I hope the following information can better help you buy products：
Frame material：TR90
Frame construction：Full rim
UV resistance grade：UV400
Lens function：TAC polarization
Lens width：54mm
Lens height：52mm
Bridge：20mm
Temple length：142mm
Frame width：1477mm
Weight:25.8g(Lens included)
