heterochromia

A difference in coloration in two structures which are normally alike in color. [hetero- + G. chroma, color]

- atrophic h. h. iridis after trauma or inflammation, or in old age.

- binocular h. an increase or decrease in pigmentation of one eye, with or without extraocular pigmentary defects.

- h. iridis, h. of iris a difference in coloration of the irides. See binocular h..

- monocular h. SYN: iris bicolor.

- simple h. h. iridis appearing as a developmental defect, without any innervation defect.

- sympathetic h. h. iridis occurring after lesions of the cervical sympathetic nerves.

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het·ero·chro·mia -'krō-mē-ə n a difference in coloration in two anatomical structures or two parts of the same structure which are normally alike in color <\heterochromia of the iris>

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n.

colour difference in the iris of the eye, which is usually congenital but is occasionally secondary to inflammation of the iris (as in Fuchs' heterochromic cyclitis). In heterochromia iridis one iris differs in colour from the other; in heterochromia iridum one part of the iris differs in colour from the rest.

• heterochromic adj.

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het·ero·chro·mia (het″ər-o-kroґme-ə) [hetero- + chrom- + -ia] diversity of color in a part or parts that should normally be of one color. heterochromic adj