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.
Two of the most popular programming languages, especially first languages, are Ruby and Python. Ruby is used widely for websites such as Airbnb, Hulu, Kickstarter, and Github. Python is used for websites such as Google, YouTube, Spotify, and Quora. Both languages came around in the mid-90s.