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Contact lenses are invaluable visual correction devices that are a normal part of our daily life. Most contact lens solutions clean, disinfect, lubricate, and remove protein deposits from the lens while matching certain chemical properties of the ocular area. While these solutions may disinfect, similar properties to ocular fluids and increasing resilience of new bacterial and fungal strains make contamination a greater concern. Any breach or micro leak in the container closure greatly increases the risk of contamination of the contact lens solution.

Package defects are the primary cause of contaminated eye care solutions. While visual inspection and leak testing can detect many container failure modes in an uncapped container, minor inaccuracies or marks in the flange area allow bacteria and fungi to enter the product. This is the most common and difficult container defect to detect, since it remains hidden beneath the cap once applied.

Aside from visual inspection issues, liquid-filled packages present a variety of leak testing challenges, including low head space. PTI's Vacuum Decay leak testing technology capable of detecting defects as small as 5 microns in both liquid and air-filled containers. The method is ASTM certified and Food and Drug Administration (FDA) consensus standard, removing false positives and subjective results associated with manual visual inspection.

Testing Contact Lenses using VeriPac 410 Technology

The VeriPac 410 is a Container Closure Integrity Test (CCIT) that provides non-destructive seal and leak detection for low headspace blister packs, sachets, and pouches. To determine package integrity in multi-cavity blister packs and low head space packaging, a variety of test methods are used, the majority of which are destructive, subjective, and unreliable.

To detect defective packages, the VeriPac 410 employs a combination of Vacuum Decay technology and differential force measurement. The 410 can test multiple packages in a single test cycle, depending on the package specifications. The VeriPac 410 can also determine which package or blister cavity is faulty. The results of the tests are quantitative and provide operators with a clear pass/fail result.

Package quality assurance is achieved using precise, dependable, non-destructive inspection methods that eliminate subjectivity from the testing process. The VeriPac 410 enables tested products to be returned to the production line, reducing the cost and waste associated with destructive leak testing methods. VeriPac 410 covers all aspects of low volume flexible and semi-flexible package leak testing. The VeriPac 410's ROI makes it a powerful solution for the pharmaceutical industry.

Benefits of VeriPac 410 Technology

• Non-destructive, non-invasive, no sample preparation
• Non-subjective, accurate and repeatable results
• Capability to test multiple packages in a single test cycle
• Identifies which package is defective
• Simplifies the inspection and validation process
• Supports sustainable packaging initiatives
• ASTM test method and FDA standard
• Cost effective with rapid return on investment