Medical Definition of Filar micrometre ocular
1.
A micrometre ocular with crossed lines which can be simultaneously focused in and moved across the field by means of a micrometre screw.
The amount of displacement can be read in 0.01 steps on the micrometre drum head. This makes a very delicate measuring device, since calibration of the micrometre scale by means of a stage micrometre gives values for each interval on the drum head which are much less than the resolving power of the highest-aperture objectives.
(05 Aug 1998)
Lexicographical Neighbors of Filar Micrometre Ocular
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