Definition

A device used to measure pressure, especially the pressure inside the eye to check for conditions like glaucoma.

Example

The doctor used a tonometer to check the patient's eye pressure during the examination.

Conversation

I just had my eye exam, and they used a tonometer to check my eye pressure.

Oh really? How does that work?

It's a device that measures the pressure inside your eye to help detect glaucoma.

That sounds interesting! I should probably get my eyes checked too.

Synonyms & Antonyms

Root Explanation

Tonometer → It is formed from "tono-" (from Greek "tonos", meaning tension or tone) and "-meter" (from Greek "metron", meaning measure). A tonometer is an instrument that measures tension or pressure, particularly in the context of eye pressure.

Memory Tip

Think of 'tone' or 'tension' ('tono-') being measured ('-meter') — that's what a tonometer does.

Visually Confused Words