halometer


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halometer

 [hah-lom´ĕ-ter]
1. an instrument for measuring ocular halos.
2. an instrument for estimating the size of erythrocytes by measuring the halos formed around them when a beam of light shines on them and is diffracted.

ha·lom·e·ter

(hal-om'ĕ-tĕr),
An instrument used to measure the diffraction halo of a red blood cell; based on the premise that the halo of the large erythrocyte of pernicious anemia is smaller than that of the normal cell; the hazy colorless halo of normal size is characteristic of secondary anemia.

ha·lom·e·ter

(hal-om'ĕ-tĕr)
An instrument used to measure the diffraction halo of a red blood cell; based on the premise that the halo of the large erythrocyte of pernicious anemia is smaller than that of the normal cell; the hazy, colorless halo of normal size is characteristic of secondary anemia.