Home›Browse›concave lens🌐EnglishEnglishPortuguêsSvenskaالعربيةहिन्दीไทย한국어中文EntityQ6524048· pop 10concave lensSign in to savelight transparent structure which is thin in middle and thick in its edgesAvailable in 10 languages中文PortuguêsCzechEstonianMalayNorwegianSvenskazh_yueไทยvia Wikidata sitelinks · CC0