Reading stone
id:
reading-stone-258-4476289
title:
Reading stone
text:
A reading stone is an approximately hemispherical lens that can be placed on top of text to magnify the letters so that people with presbyopia can read it more easily. Reading stones were among the earliest common uses of lenses. The invention of reading stones is often credited to Abbas ibn Firnas in the 9th century, although the regular use of reading stones only began around 1000 AD. Early reading stones were manufactured from rock crystal (quartz) or beryl as well as glass, which could be sh
brand slug:
wiki
category slug:
encyclopedia
description:
Optical device
original url:
https://en.wikipedia.org/wiki/Reading_stone
date created:
date modified:
2023-07-12T09:54:04Z
main entity:
{"identifier":"Q1820708","url":"https://www.wikidata.org/entity/Q1820708"}
image:
{"content_url":"https://upload.wikimedia.org/wikipedia/commons/b/b8/2015-08_archeon_reading_stone.JPG","width":5184,"height":3456}
fields total:
13
integrity:
15