The purpose of this study is to assess the quantity and quality of myopia related articles from 2001 to 2021 using bibliometric methods. The number of published articles and citations, the correlation analysis between gross domestic product (GDP) and annual publication number and citations was investigated. The proportion of myopia articles from East Asia accounted for 55.28% in 2021. The researchers from China published the most articles on myopia during 2001 to 2021, followed by Japan and South Korea. The annual number of articles and citations from China and South Korea showed an exponential increase with strong positive correlation with GDP. All 3 countries in East Asia are mainly researching refractive surgery, prevalence, and glaucoma, and research on children’s myopia is particularly active in China, and in Japan. The researchers from East Asia published more than half of articles on myopia since 2019, in order of China, Japan, and South Korea. The annual number of articles and citations from China and South Korea showed an exponential increase with strong positive correlation with GDP whereas those from Japan did not. All 3 countries are mainly researching refractive surgery, and glaucoma, and research on children’s myopia is particularly active in China, and in Japan.
Contact lens materials include polymers that are ionized in the ocular pH condition and are susceptible to protein deposition due to their surface characteristics. Herein, we investigated the effect of the electrostatic state of the contact lens material and protein on protein deposition level using hen egg white lysozyme (HEWL) and bovine serum albumin (BSA) as model proteins and etafilcon A and hilafilcon B as model contact lens materials. Only HEWL deposition on etafilcon A showed a statistically significant pH-dependency (p < 0.05); protein deposition increased with pH. HEWL showed a positive zeta potential at acidic pH, while BSA showed a negative zeta potential at basic pH. Only etafilcon A showed a statistically significant pH-dependent point of zero charge (PZC) (p < 0.05), implying that its surface charge became more negative under basic conditions. This pH-dependency of etafilcon A is attributed to the pH-responsive degree of ionization of its constituent methacrylic acid (MAA). The presence of MAA and its degree of ionization could accelerate protein deposition; more HEWL deposited as pH increased despite the weak positive surface charge of HEWL. The highly negatively charged etafilcon A surface attracted HEWL, even overwhelming weak positive charge of HEWL, increasing the deposition with pH.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.