Keiji Yamashita

Title: Keiji Yamashita: Innovator in Ophthalmic Lens Technology

Introduction

Keiji Yamashita is a prominent inventor based in Nagoya, Japan. He has made significant contributions to the field of ophthalmic lens technology, holding a total of 5 patents. His innovative approaches have advanced the methods and devices used in the production of ophthalmic lenses.

Latest Patents

Yamashita's latest patents include a method of molding ophthalmic lens products and a device for molding ophthalmic lens material. The method involves using a mold assembly with a mold cavity to polymerize a liquid monomer composition, resulting in a lens product that corresponds to the configuration of an ophthalmic lens. The process includes preparing a mold assembly with a monomer storage space, filling the mold cavity with the liquid monomer composition, and polymerizing it under specific temperature and pressure conditions. The device for molding ophthalmic lens material features a lower die and an upper die, designed to create a molding cavity that ensures superior transcriptability and uniform lens shape.

Career Highlights

Yamashita works at Menicon Co., Ltd., a leading company in the field of contact lenses and ophthalmic products. His work has been instrumental in enhancing the efficiency and quality of lens production.

Collaborations

Yamashita collaborates with notable colleagues such as Tatsuya Ojio and Yasuyoshi Yamamoto, contributing to the advancement of ophthalmic lens technology through teamwork and shared expertise.

Conclusion

Keiji Yamashita's innovative work in ophthalmic lens technology has led to significant advancements in the industry. His patents reflect a commitment to improving lens production methods and devices, showcasing his role as a key figure in this specialized field.