1.56 Mid-Index Single Vision Lenses

Product Introduction

The Practical Balance: 1.56 Mid-Index Performance

For the vast majority of eyewear users, the 1.56 Mid-Index lens represents the "Sweet Spot" between performance and affordability. Engineering to be approximately 15% to 22% thinner and lighter than standard 1.50 CR-39 lenses, the 1.56 index provides a noticeable aesthetic improvement for prescriptions ranging from -2.00D to -4.00D. This material is crafted from a specialized NK-55 resin, which offers a robust balance of tensile strength and thermal stability. Unlike lower-index materials, our 1.56 series is inherently more effective at blocking UV radiation and provides a smooth, aspheric surface profile that reduces the "bulging" effect often seen in plus-power lenses. Its popularity in the global market stems from its versatility; it is the ideal substrate for photochromic treatments and blue-light filtration coatings. The 1.56 index also maintains a respectable Abbe Value of 38, ensuring that while the lens is thinner, the visual clarity remains excellent for daily tasks. This is the go-to lens for general-purpose prescription eyewear, providing a professional look without the high cost of premium high-index resins. Whether for distance vision, reading, or computer use, our 1.56 single vision lenses deliver reliable, high-definition results for a broad demographic of wearers.