If you have a strong prescription, youāve probably heard about high-index lensesāspecifically 1.67 and 1.74. But which one is better for you?
Choosing between 1.67 vs. 1.74 high-index lenses depends on factors like lens thickness, weight, durability, and cost. Letās break down the key differences so you can find the best lenses for your needs.
What Are High-Index Lenses?
High-index lenses are designed to be thinner and lighter than standard plastic lenses. The higher the index number, the thinner the lens.
š¹ Standard plastic lenses: 1.50 index
š¹ Polycarbonate lenses: 1.59 index
š¹ 1.67 high-index: 30% thinner than standard plastic
š¹ 1.74 high-index: 40+% thinner than standard plastic
If your prescription is stronger than -4.00D, high-index lenses help reduce the bulky ācoke-bottleā effect of thick lenses.
Key Differences Between 1.67 and 1.74 Lenses
Feature |
1.67 High-Index Lenses |
1.74 High-Index Lenses |
Thickness |
Thinner than 1.50 & 1.59 lenses |
Thinnest high-index lenses available |
Weight |
Lightweight but slightly thicker than 1.74 |
Lightest option for strong prescriptions |
Prescription Range |
Works well up to -7.00D |
Best for -6.00D and above |
Durability |
More impact-resistant |
Slightly more brittle |
Cost |
More affordable |
More expensive |
Optical Clarity |
Excellent |
Excellent, but slightly more reflections |
1.67 High-Index Lenses: Pros & Cons
ā
Pros:
āļø Thinner than standard and polycarbonate lenses
āļø More durable than 1.74 lenses
āļø Less expensive than 1.74 lenses
āļø Works well for prescriptions up to -7.00D
āļø Good for progressive or bifocal lenses
ā Cons:
ā Slightly thicker than 1.74 high-index lenses
ā Not ideal for extremely strong prescriptions (-8.00D and above)
Best for: Those who want thin, durable lenses at a more affordable price, especially if their prescription is between -4.00D and -7.00D.
1.74 High-Index Lenses: Pros & Cons
ā
Pros:
āļø Thinnest high-index lenses available
āļø Lightest option for high prescriptions
āļø Best for prescriptions stronger than -7.00D
āļø Reduces the ābug-eyeā effect for high farsightedness (+4.00D and above)
ā Cons:
ā More brittle than 1.67 lensesācan crack if dropped
ā More expensive than 1.67 lenses
ā Higher reflectivityāanti-reflective (AR) coating is a must
Best for: People with very strong prescriptions (-8.00D and above) who want the thinnest, lightest lenses possible.
Which Lens Should You Choose?
Choosing between 1.67 and 1.74 high-index lenses depends on your prescription strength, budget, and lifestyle.
Go for 1.67 High-Index Lenses if:
āļø Your prescription is between -4.00D and -7.00D
āļø You want a balance between thinness, durability, and cost
āļø You wear progressive or bifocal lenses
Go for 1.74 High-Index Lenses if:
āļø Your prescription is stronger than -7.00D
āļø You want the absolute thinnest and lightest lenses
āļø You donāt mind paying a higher price for ultra-thin lenses
Pairing High-Index Lenses with the Right Frames
Since high prescriptions can cause lens distortion, the right frame choice matters.
ā
Asian fit frames: Prevents slipping for better vision stability
ā
Smaller frames: Reduce edge thickness for stronger prescriptions
ā
Lightweight materials: Titanium or TR90 frames balance the weight of high-index lenses
Final Verdict: 1.67 or 1.74?
š¹ If you want thin, affordable, and durable lenses, go with 1.67 high-index lenses.
š¹ If you need the thinnest, lightest lenses for very high prescriptions, choose 1.74 high-index lenses.
š No matter which you choose, pairing them with Asian fit frames from NextPair ensures maximum comfort and clarity for your vision!