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We are dedicated to providing the ophthalmic industry with innovative, high quality and cost-effective products. Headquartered in St. Louis, Missouri, PSI maintains a state-of-the-art manufacturing facility. In these days of cost containment, we realize that procedural costs are of the utmost concern. Your decision to purchase Assurance Products directly from PSI enables you to eliminate the second markup of the distributor. PSI takes pride in its ability to utilize a skill to make surgical instruments. Each product goes through the scrutiny of 7 separate inspection stations, with the most stringent inspection being #8, our customers.