Fig. 4.

Annual PubMed publications with the term OCT in the title or abstract, along with a categorization of topic / clinical specialty. Dates where the first commercial clinical products were introduced are indicated. Note in some cases there were earlier commercial releases of products, but some companies did not achieve positive revenues and left the market. Since scientific and clinical publications are a bellwether for scientific and clinical knowledge as well as clinical adoption, this data shows the key role of industry. There are ~20,000 publications in a wide range of clinical specialties as well as other applications.