Tonometer is a medical device used to measure the pressure inside the eye. As it is a specialized term, there are a few synonyms that can be used in its place. Synonyms for tonometer include:
1. Ocular tension measurer
2. Eye pressure gauge
3. Intraocular pressure device
4. IOP meter
5. Glaucoma tester
6. Eye tension reader. These terms are commonly used by ophthalmologists and optometrists to refer to this important diagnostic tool. Tonometers are used to diagnose and monitor eye conditions such as glaucoma and ocular hypertension that can lead to vision loss if left untreated.