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Ophthalmic Lenses Color Measurement

Historically, eyeglasses have been seen as unfashionable and carried several potentially negative connotations. Today, as much as they are used to correct visual deficiencies such as myopia, hyperopia, astigmatism, and presbyopia, eyeglasses and contact lenses have become an acceptable fashion item and often act as a key component in defining an individual’s personal image. An important aspect in the production of ophthalmic lenses is color measurement, and manufacturers of these lenses and the raw materials used to make them have relied on the knowledge and expertise of HunterLab for over 60 years to help them maintain color consistency throughout their supply chain.

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Industries

Building Material

Chemical

Food

Paint & Coatings

Pharmaceutical

Paper

Plastic

Pellets

Extruded Plastic

Bottles

Preforms

Plaques

Ophthalmic Lenses

Textile

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Plastic lenses are currently the most commonly prescribed lens, due to their relative safety, low cost, ease of production, and outstanding optical quality. Color measurement is performed throughout the manufacturing process of ophthalmic lenses and blanks, from incoming QA tests of the liquid polymer ingredients to that of their finished products, including the film used as polarizers in prescription sunglasses and anti-reflection coatings. Color measurement is also used for weathering or performance testing, and color testing for lot-to-lot tint characteristics.

Many HunterLab spectrophotometers have the versatility to accommodate most applications of color measurement, however, based on 60+ years of experience and a thorough understanding of our customers’ needs and product use, these particular instruments are most suited for this industry application:

 

UltraScan PRO (Diffuse d/8° sphere Geometry, Reflectance and Transmittance, 350-1050 nm)

30% of our customers select this high-performance instrument for its extended wavelength measurement and its ability to measure both reflected and transmitted color.

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UltraScan VIS (Diffuse d/8° sphere Geometry, Reflectance, and Transmittance, 360-780 nm)

30% of our customers select this instrument for its extended wavelength measurement and its ability to measure both reflected and transmitted color of samples that are transparent to opaque.

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