How to Choose the Right Lenses for Your Glasses
aspheric lenses, lens refractive index 1.56 1.61 1.67, best lenses for myopia, which lens to choose, buyglasses lenses
Discover the best lens type for your needs and budget.
Types of Lens Materials
1. Glass Lenses:
Made of optical glass, these lenses offer excellent clarity and a high refractive index. The higher the index, the thinner the lens. However, they are heavy, fragile, and not easy to maintain—making them less practical for everyday use.
2. PVC Plastic Lenses:
Made from thermoplastics, PVC lenses are cheap but have poor light transmission, are not heat-resistant, and easily deform. They're suitable only for decorative glasses—not recommended for regular wearers.
3. Nylon Lenses:
Made of transparent polyamides, originally used in astronaut visors and military gear. These are light, impact-resistant, and very durable. Because of their high cost, they’re typically used in luxury sunglasses and sports eyewear.
Note: Many cheap lenses on the market claim to be nylon but are actually generic polyamide, not true nylon.
4. Resin Lenses:
Resin lenses are the most popular option today. They are lightweight, impact-resistant, and have good transparency. Coated resin lenses offer additional benefits like water resistance and scratch resistance. They can also come with UV protection, blue light blocking, photochromic tint, etc.
Most optical stores (including buyglasses.com) primarily offer coated resin lenses due to their great value and versatility.
Spherical vs. Aspheric Lenses – Which Is Better?
Traditional lenses use a spherical design, which can lead to distortion and narrower vision fields.
Aspheric lenses, on the other hand, have an optimized curvature that reduces distortion, improves clarity, and looks more natural and stylish. They’re also thinner and lighter.
Advantages of Aspheric Lenses:
· Clearer Vision – Better optics, especially at the edges
· More Comfortable – Lightweight and less bulky
· Natural Look – Less distortion, more aesthetically pleasing
In today’s quality- and appearance-conscious world, aspheric lenses are strongly recommended.
Lens Refractive Index: 1.56 vs 1.61 vs 1.67
The refractive index determines how thick or thin your lens will be for a given prescription:
· 1.56 – Good for low prescriptions (<200 power)
· 1.61 – Recommended for prescriptions between 200–400 power
· 1.67 – Ideal for high myopia (500 power and above)
Higher refractive index lenses are thinner and lighter but also more expensive.
For the same index, aspheric lenses are thinner than spherical ones.
Best Choice for Most People
For everyday wear, aspheric, coated resin lenses are the best combination of comfort, durability, and affordability.
If budget is not a concern, luxury or specialty lenses can be considered—but for most users, modern resin lenses deliver everything you need.
buyglasses.com Recommendation
buyglasses.com uses in-house manufactured, aspheric, premium coated resin lenses with anti-scratch and anti-reflective coatings—at no extra cost.
Buy a frame and get a free pair of 1.56 standard lenses (for CYL -0.25 ~ -2.00). Great quality at unbeatable prices.
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This article was written by the buyglasses.com team. Buy glasses at factory prices on buyglasses.com.