An optical instrument, invented by Hipparchus, for taking altitudes, leveling, etc.
Distinctness or clearness, as of an image formed by an optical instrument; precision in detail.
We have now seen that the eye in itself is not by any means so complete an optical instrument as it first appears: its extraordinary value depends upon the way in which we use it: its perfection is practical, not absolute.
Defn: An optical instrument, consisting of a lens, or combination of lenses, for making an enlarged image of an object which is too minute to be viewed by the naked eye.
Defn: The eyepiece of an optical instrument, as of a telescope or microscope.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "optical instrument" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.
