6 votes Why do billions of people still not have glasses? Posted November 20, 2019 by Sahasrahla Tags: healthcare, health.global, eyesight, glasses, optometry, author.tim harford, source.bbc https://www.bbc.com/news/business-49991877 Link information This data is scraped automatically and may be incorrect. Published Nov 20 2019 Word count 1410 words