optometer
/ɑpˈtɑmɪtər/
noun
- An instrument used to measure the refractive power of the eye and determine the correct prescription for eyeglasses or contact lenses.
- She sat quietly while the optometer measured her vision for new glasses.
- The optician used an optometer to check how well my eyes focus on distant objects.
- Modern optometers are often computerized and give quick results.
Synonyms