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History of Lens Care Products in Japan: Insights From Advertisements in the Journal of the Japan Contact Lens Society for 65 Years.
Eye Contact Lens
December 2024
Department of Ophthalmology (H.T.), Juntendo University Shizuoka Hospital, Izunokuni, Japan; Department of Ophthalmology (A.M.), St. Marianna University School of Medicine, Kawasaki, Japan; Department of Innovative Visual Science (S.K.), Osaka University Graduate School of Medicine, Osaka, Japan; Department of Ophthalmology (Y.H.), Toho University Faculty of Medicine, Tokyo, Japan; and Japan Contact Lens Society (H.T., A.M., S.K., Y.H.), Osaka, Japan.
This review examines the history of contact lens (CL) care products, particularly focusing on hard contact lenses (HCLs) like those made from polymethyl methacrylate and rigid gas permeable (RGP) materials. Although literature on CL history is extensive, there is limited information on the history of CL care products, especially in Japan. This review uses advertisements from the Journal of the Japan Contact Lens Society from 1959 to 2023 to trace the evolution of these products.
View Article and Find Full Text PDFBiomechanical evaluation of different plunger size and plunger position on removing soft contact lenses and rigid gas permeable contact lenses.
Technol Health Care
November 2024
Department of Medical Research, Taichung Veterans General Hospital, Taichung, Taiwan.
Background: To avoid risks of mucosal infection from contact lenses removal, a contact lens plunger is often used.
Objective: Given various types of contact lens plungers available on the market, no study has yet been done on mechanical effects of the contact lens plunger on contact lens removal. Here, this study used finite element analysis to investigate the effects of plunger size and plunger position on the removal of soft and rigid gas permeable (RGP) contact lenses.
Cationic Gas-Permeable Mold Fabrication Using Sol-Gel Polymerization for Nano-Injection Molding.
Gels
July 2024
Department of Pharmaceutical Engineering, Toyama Prefectural University, Imizu 939-0398, Toyama, Japan.
Cationic gas-permeable molds fabricated via sol-gel polymerization undergo cationic polymerization using epoxide, resulting in gas permeability owing to their cross-linked structures. By applying this cationic gas-permeable mold to nano-injection molding, which is used for the mass production of resins, nano-protrusion structures with a height of approximately 300 nm and a pitch of approximately 400 nm were produced. The molding defects caused by gas entrapment in the air and cavities when using conventional gas-impermeable metal molds were improved, and the cationic gas-permeable mold could be continuously fabricated for 3000 shots under non-vacuum conditions.
View Article and Find Full Text PDF[Keratoconus: main lines of research].
Vestn Oftalmol
May 2023
Krasnov Research Institute of Eye Diseases, Moscow, Russia.
Keratoconus (KC) research focuses on studying pathogenesis, advancing diagnostic techniques and methods of correction and treatment. The working hypothesis for KC etiopathogenesis is based on abnormalities in distribution of microelements in the cornea and its potential influence on the processes of stromal collagen disorganization. Improvement of early diagnosis of KC is associated with evaluation of microstructural changes in the cornea using computerized methods such as Scheimpflug camera and high-definition optical methods for visualization of initial signs of a pigment ring.
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