anterior

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anterior

1. Zoology of or near the head end
2. Botany (of part of a flower or leaf) situated farthest away from the main stem

anterior

[an′tir·ē·ər]
(zoology)
Situated near or toward the front or head of an animal body.
References in periodicals archive ?
The anterior chamber angle and outflow defects in early-onset glaucoma are similar to those in primary congenital glaucoma (PCG), which represents another eye anterior anatomical defect and the most common form of glaucoma in infants.
Pupil diameter (PD), anterior chamber depth (ACD), anterior chamber angle (ACA), angle opening distances (AOD) at both 500 [micro]m and 250 [micro]m (AOD250) were measured from the UBM scans and evaluated to determine whether any significant changes occurred in the AS in the drug-free period.
For each subject, corneal thickness, anterior chamber depth (ACD), corneal volume, anterior chamber angle (ACA), corneal curvature, and anterior chamber volume (ACV) were obtained through Pentacam before and after instillation of drops.
The study was performed with the aim of comparing the anterior chamber angle on gonioscopy & optical coherence tomography as well as evaluating the nerve fiber layer thickness & ganglion cell layer thickness in glaucoma patients.
Can preoperative anterior chamber angle width predict magnitude of intraocular pressure change after cataract surgery?
2%) of 142 eyes, and included infiltration of iris in 10 eyes (7%), ciliary body invasion in 13 (9%), anterior chamber angle seeds in 13 (9%), choroidal infiltration in 57 (40%), prelaminar optic nerve invasion in 24 (17%), optic nerve lamina cribrosa invasion in 15 (11%), retrolaminar optic nerve extension in 24 (17%), involvement of optic nerve to line of transection in 11 (8%), infiltration of sclera in 13 (9%), and extrascleral extension in 9 (6%) eyes.
Ocular features comprise iris stromal hypoplasia causing the eyes to appear dark, and strands of iris tissue crossing the anterior chamber angle.
Imaging of the anterior chamber angle is one of the principal areas studied in the detection of closed angle glaucoma pathologies and related surgical filtering.
They usually grow locally on the surface of the iris or toward the anterior chamber, though they can also extend toward the anterior chamber angle or the ciliary body.
In this study, the diagnostic of criteria was defined by a normal anterior chamber angle and two of the following symptoms: (1) IOP > 21 mmHg (no IOP lowering therapy); (2) characteristic visual field defects; (3) glaucomatous optic nerve head changes (cup-disc [C/D] ratio >0.

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