Lens specifications3 min read
Choosing 65, 70 or 75 mm Lens Diameter
Choose an uncut optical lens diameter using frame shape, centration and power availability. Build a cutout approval checklist before ordering stock lenses.
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Technical buying references
Optical Lens Buying Guides
Clear explanations for comparing lens materials, coatings, performance claims, samples, and purchasing specifications.
29 practical guides Page 1 of 4
Start with a buyer question
Make specifications easier to compare.
These guides are written for distributors, optical laboratories, retail groups, and independent buyers preparing samples or quotations.
Wholesale ordering3 min read
Building a Sphere and Cylinder Order Matrix
Prepare a stock lens order matrix with clear sphere and cylinder notation, diameter, coating and quantities. Prevent missing combinations and order ambiguity.
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Laboratory supply3 min read
Specifying Semi-Finished Lens Base Curve
Compare semi-finished lens base curves with design identifiers, blank geometry and laboratory compatibility before approving a surfacing supply program.
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Lens specifications3 min read
Comparing Center and Edge Thickness
Compare lens thickness fairly by holding prescription, frame, centration, design and processing constraints constant. Ask for a job-specific thickness estimate.
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Lens materials3 min read
Abbe Value and Optical Lens Materials
Understand what Abbe value says about lens material dispersion and how to compare it with index, density and design without overstating wearer benefits.
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Quality documentation3 min read
Polycarbonate Impact-Test Documentation
Build a product-specific impact-test document request for polycarbonate lenses. Review sample identity, test method, processing stage and destination requirements.
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Performance specifications3 min read
UV400, UV420 and Transmission Reports
Review UV400 and UV420 lens claims using wavelength-resolved transmission data, sample details and stated criteria rather than coating color or a single reading.
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Lens coatings3 min read
Understanding AR Coating Reflection Color
Evaluate anti-reflective lens coating color using approved viewing conditions and product data. Separate residual reflection, tint and blue-filter performance.
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Lens coatings3 min read
Hydrophobic and Oleophobic Lens Coatings
Specify water repellency, oil repellency and cleanability as separate lens coating requirements, with agreed test methods and durability conditions.
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