The Inspection Process For Eyewear

The trend of outsourcing production is gaining increasing popularity as globalization turns the world into one huge market. Among these products, eyewear from countries such as China constitutes as a big part of outsourced products. However, the concerns regarding quality and standard are always present in the business’s mind when eyewear is outsourced- because a compromise on quality means not only a compromise on sales but also a compromise on the company’s integrity and name.

This is the reason why ATI(Third party quality inspection Team) takes quality concerns as one of its top most priority; the following are among the measures taken by ATI to ensure that each piece of eyewear meets its quality requirements:

Material Inspection Process

  • ATI takes effective measures to verify that the correct type of resins and additives constitute plastic lenses. It is of utmost importance that that eyewear possesses just the right amount of certain aspects such as gravity, refractive index, and Abbe value.
  • ATI makes sure that only top quality and specified raw materials are used in the production of spectacle glass lenses.
  • ATI uses materials that enhance the eyewear’s hardness, color, anti-reflectance as well as water resistance. Using approved coating and finishing materials raise the functionality of the eyewear tremendously, further providing safety against abrasion, static and UV protection.
  • The frames used by ATI are of top-quality materials such as carbon fiber, plastic, rubber and light metal alloy.

Lens Inspection

The following are measures taken by ATI to ensure that lens used in eyewear abide by certain quality standards as required by the business:

  • Impact resistance test: this test verifies the resistance of lens by making use of the procedures as given by 21 CFR Part 801.410 or superior test method. The ‘drop ball test’ requires dropping a 5/8 inch ball made of steel that weighs around 16 grams from a height of 50 inch. This is a basic requirement for sunglasses and eyeglasses being sold in the United States, which also requires a certificate of issuance from the supplier. An alternate approach to this method is the variable height impact test as used by eyewear quality inspectors.
  • Refractive index check: this test makes sure that the lens possesses the required refractive index that is specific to its type. The BS 7394: Part 2 lays out the specific refractive indices for spectacle lens.
  • Abbe Value Test: this test determines the abbe value by making sure of the appropriate lab tests that can determine the dispersion of light. An abbe value that is higher means that there would be lower dispersion of light and therefore will offer a better quality experience for the users.
  • Density check: this test requires comparing finished and semi-finished products with those samples that have already been approved in compliance with specifications given by the importer. This holds grave importance because it may outline any potential lack of quality or gap between the quality of products being produced and the sample given.
  • Reflective index check: this test demonstrates the anti-glare property of the lens so that consumers do not strain their eyes or are impacted by glaring light.
  • Abrasion resistance check: this test checks the resistance of the lens against abrasion, which is a great measure to check its longevity and durability. This is done by rubbing a clean piece of cotton by hand on the surface of the lens and then check for any scratches or transfer of color from the lens.
  • Transition lens check: this test looks upon the time that is required for the lens to change color from dark to clear and then back again under certain lighting conditions.
  • Transmittance rating check: to put simply, transmittance rating check illustrates how much of light passes through the lens without any absorption. These ratings differ by country or region. These ratings must also comply with standards including EN 1836:2005, AS/NZS 1067:2003, and ANSI Z80.3-2001.
  • UV Protection test: UV protection is one of the foremost functions for which common eyewear is used; hence this test measures how much UV protection is offered by these eyewear.
  • Lens dimensional check: this test looks at basic specifications such as thickness, edge thickness, roundness, base curve, and diameter.

Frame Inspection

  • Compare the style of the frame with that of the approved sample to see if there is any discrepancy in the rim, model, number or style of the frame.
  • Compare the color of the frame with the approved sample or values given in the Pantone color chart.
  • ATI inspects that the eye size and related dimensions are in accordance with the specifications provided by the importer.
  • The quality inspectors also check for any attachments of the frame, and make sure that they are free of any defects such as scratches or chips.

Assembled Eyewear Inspection

  • Verify that the lenses fit into the frame perfectly: neither loose not tight so that the lens does not fall off during normal usage. This is especially important for high-end sunglasses and industrial eyewear.
  • Check for any cosmetic defects in the eyewear such as scratches, chips, coating pits or blemishes.
  • ATI also takes measures to see that drilled lenses are free from any visible cracks or deformities in the drill holes.
  • Quality inspectors take upon themselves to make sure that labels on the eyewear comply with relevant standards for the importer such as the brand name, model, as well as UV rating.
  • The packaging should be protective and according to the contractual specifications.

All of the above mentioned measures make sure that eyewear, covering one of the most sensitive body part, are in compliance with all health and safety standards, as well as all contractual compliance. This would mean high quality of products for the company as well as high customer satisfaction.  


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