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They determined that contact lenses needed to have an average Dk/t of at least 24.1 for daily wear and at least 87.1 for extended wear in order to keep overnight corneal swelling to 4% or less. It would be many years after this 1984 publication before the industry would be able to produce lenses that actually met the overnight wear standards.A brilliant researcher, Dr. Mertz was known for his encyclopedic knowledge of literature and science, and for his integrity, according to Dr. Schnider. With his gruff manner, Dr. Mertz could be intimidating at first, but closer association revealed “a kind and gentle soul in this big teddy bear of a man,” she said. Much of his career was spent in clinical research and professional education in the contact lens industry, where he held executive management positions at Bausch and Lomb, CIBA Vision, and Vistakon.Prof. Holden continues to be closely involved with contact lens research, but his interests in recent years have broadened to include social justice and public health. He now dedicates much of his time to global blindness prevention efforts as chair of the Refractive Error Working Group of the World Health Organization (WHO) and the Refractive Error Program Committee and board of trustees of the International Association for the Prevention of Blindness (IAPB). He is co-chair of the Vision 2020 Australia group, which strives to eliminate avoidable blindness by the year 2020. He is also executive chair of Optometry Giving Sight, which brings together all the blindness prevention NGOs, the World Council of Optometry and its member affiliates in every country, and the International Centre for Eyecare and Education to raise funds to eliminate blindness and impaired vision due to uncorrected refractive error for 300 million people in need throughout the world.His longtime colleague at the CCLRU, Deborah Sweeney, B.Optom., Ph.D., said of Prof. Holden, “Not only does he challenge his colleagues to perform at their best, but he has consistently challenged the contact lens industry to make better products.” Prof. Sweeney currently serves as CEO of the Vision Cooperative Research Centre (CRC). She has authored numerous clinical papers and scientific works, including a book on silicone hydrogel lenses.
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