Overview
Single vision lenses are the most basic type of prescription lenses, designed to correct a single visual condition. Unlike progressive or bifocal lenses, they have one consistent optical power throughout the entire lens surface. These lenses are widely used in eyeglasses for correcting myopia (nearsightedness), hyperopia (farsightedness), and astigmatism. Manufactured from various materials including CR-39 plastic, polycarbonate, high-index plastics, and (less commonly today) glass, single vision lenses account for approximately 60% of all prescription lenses sold globally. Their simplicity makes them cost-effective for both manufacturers and consumers, while modern materials and coatings have significantly improved their optical performance and durability.
Product Features
The primary feature of single vision lenses is their uniform refractive power across the entire surface, providing clear vision at a fixed distance. Modern versions incorporate advanced features like anti-reflective coatings, UV protection, and blue light filtering options. Polycarbonate and Trivex materials offer inherent impact resistance, making them ideal for safety glasses and children's eyewear. High-index plastic versions allow for thinner, lighter lenses even with strong prescriptions, while maintaining optical clarity. The Abbe value (measure of chromatic aberration) varies by material, with CR-39 offering the highest optical quality for standard prescriptions. Recent developments include photochromic options that darken in sunlight while maintaining the single vision correction.
Main Uses
Single vision lenses serve as the fundamental solution for most refractive vision corrections. They are prescribed for general-purpose glasses worn full-time by individuals with consistent visual needs. Computer glasses often use single vision lenses with a specific focal length optimized for screen viewing distances. In occupational settings, specialized single vision lenses are used in safety glasses, magnifiers, and certain industrial viewing equipment. The automotive industry incorporates them in vehicle mirrors and display systems. Their simplicity also makes them the lens of choice for budget-conscious consumers and bulk procurement situations like school vision programs.
Culture and Development
The history of single vision lenses dates back to 13th century Italy with the invention of reading stones. Glass remained the dominant material until the 1940s when CR-39 plastic was developed, followed by polycarbonate in the 1970s. These material advances revolutionized lens weight, safety, and production scalability. In contemporary eyewear culture, single vision lenses represent both practicality and fashion. While progressive lenses cater to presbyopia, the majority of younger wearers use single vision corrections. The global market continues to see innovation in coatings and materials, with environmentally conscious options gaining traction in B2B procurement circles.
B2B Procurement Guide
When procuring single vision lenses wholesale, consider material specifications based on your target market. CR-39 offers the best optical clarity for general use, while polycarbonate suits safety applications. High-index materials (1.60-1.74) cater to premium markets needing thinner lenses. Verify certifications like FDA compliance and ISO quality standards. Minimum order quantities typically range from 100-500 pairs for custom prescriptions. Leading manufacturing regions include China, Japan, and Germany, each offering different price-to-quality ratios. For consistent supply, establish relationships with manufacturers specializing in your required material and coating combinations.
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