| ring of iris | Either of two zones on the anterior surface of the iris, separated by a circular line concentric with the pupillary border. Synonym: annulus iridis. (05 Mar 2000) |
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| ciliary margin of iris | The peripheral border of the iris attached to the ciliary body. Synonym: margo ciliaris iridis, ciliary margin of iris. (05 Mar 2000) |
| pigment cells of iris | Cell's of the stromal layer of the iris; in dark eyes (but not in blue) they contain granules of pigment. (05 Mar 2000) |
| pigmented layer of iris | The double layer of pigmented epithelium on the posterior surface of the iris. Synonym: pigmented layer of iris. (05 Mar 2000) |
| pillar of iris | The network of fibres (pectinate ligaments) at the iridocorneal angle between the anterior chamber of the eye and the venous sinus of the sclera; it contains spaces between the fibres that are involved in drainage of the aqueous humor, and is composed of two portions: the corneoscleral part, the part attached to the sclera, and the uveal part, the part attached to the iris. Synonym: reticulum trabeculare sclerae, Gerlach's valvula, Hueck's ligament, ligamentum annulare bulbi, pectinate ligaments of iridocorneal angle, pillar of iris, trabecular meshwork, trabecular network, trabecular zone. (05 Mar 2000) |
| plateau iris | In angle-closure glaucoma, a flat appearance of the iris rather than a forward convexity. (05 Mar 2000) |
| posterior surface of iris | The posterior surface of the iris. Synonym: facies posterior iridis. (05 Mar 2000) |
| crypts of iris | Pits near the pupillary margin of the anterior surface of the iris. Spaces in the anterior iris stroma through which the aqueous washes with every pupillary movement. (05 Mar 2000) |
| herpes iris | Concentric rings of erythema varying in intensity, characteristic of erythema multiforme. Synonym: herpes iris. (05 Mar 2000) |
| stroma of iris | The delicate vascular connective tissue that lies between the anterior surface of the iris and the pars iridica retinae. Synonym: stroma iridis. (05 Mar 2000) |
| iris | Origin: L. Iris, iridis, the goddess, Gr, the rainbow, iris of the eye, the plant Iris. Cf. Orris. 1. The goddess of the rainbow, and swift-footed messenger of the gods. 2. The rainbow. 3. An appearance resembling the rainbow; a prismatic play of colours. 4. <anatomy> The contractile membrane perforated by the pupil, and forming the coloured portion of the eye. See Eye. 5. <botany> A genus of plants having showy flowers and bulbous or tuberous roots, of which the flower-de-luce (fleur-de-lis), orris, and other species of flag are examples. Source: Websters Dictionary (01 Mar 1998) |
| iris bicolor | A variegated or two-coloured iris. Synonym: monocular heterochromia. (05 Mar 2000) |
| iris bombe | A condition occurring in posterior annular synechia, in which an increase of fluid in the posterior chamber causes a forward bulging of the peripheral iris. (05 Mar 2000) |
| iris dehiscence | A defect of the eye characterised by multiple holes in the iris. (05 Mar 2000) |
| iris diaphragm | <microscopy> A diaphragm with thin metal leaves so arranged that the rotation of an actuating lever varies the diameter. (05 Aug 1998) |