Analyzing Intraocular Lens Technology Trends

We evaluated the technological development patterns and newly emerged technologies of IOLs using a text-based analysis method using three types of data: patents, papers, and clinical trials. We used the methodologies of Niemann et al. [21 (link)], Block et al. [22 (link)], and Wustmans et al. [23 (link)] to compare the patents, papers, and clinical trials. In other words, if the words used in each document were similar, it was assumed that the content was also similar. Using this method, Niemann et al. [21 (link)] analyzed the similarity between patents, Block et al. [22 (link)] analyzed the similarity between patents and papers, and Wustmans et al. [23 (link)] analyzed the similarity between patents and trend data. Our research method is illustrated in Figure 1.