The Tono-Pen is a handheld device thatâs shaped like a large marker. It provides a digital readout of eye pressure. Your doctor can use it to touch your eye and measure pressure. Though useful in many cases, the Tono-Pen is considered less accurate than the Goldmann tonometer in people with normal corneas.
The English language has two types: British English and American English. Other variations such as Oxford English, Standard English, or other variants are mere adaptations of the two types (especially for consistency or reference use, e.g., in media or publication). British English.
February 23, 2016 22:26. There are 2 primary categories of programming languages: text-based programming languages and visual programming languages. Languages like Javascript or Python are text-based but Code.org's Intro course uses Blockly, which uses visual blocks that you drag and drop to write programs.