- any of various instruments for measuring the refractive error of an eye.
Origin of optometer
Examples from the Web for optometer
Historical Examples of optometer
In using the optometer, find the place where vision of the dots is the easiest and most distinct.
Test with optometer, and in reporting use the number on the stem preceded by F for far-sightedness, and N for near-sightedness.
Now, the Javal-Bull optometer permits of a quick determination of the value of the amplitude of accommodation in dioptries.
- any of various instruments for measuring the refractive power of the eye
- An instrument for determining the refraction of the eye.