anterior segment


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an·te·ri·or seg·'ment

[TA]
a delimited part or section of an organ or other structure that lies in front of or ventral to the other similar parts or sections. See: anterior (bronchopulmonary) segment [S III] [S III], anterior basal (bronchopulmonary) segment [S VIII] [S VIII], anterior inferior renal segment, anterior superior renal segment, anterior segment of eyeball.
Synonym(s): segmentum anterius [TA]

anterior segment

The segment of the eyeball (globe) formed by invasion of neural crest cells into the space between the surface ectoderm and the lens vesicle, which develops into corneal epithelium and lens vesicle. The anterior segment is susceptible to lacerations, swelling, trauma and foreign bodies. 

Components
Sclera, conjunctiva.

anterior segment

1. In ophthalmology, the ciliary body, cornea, iris and lens of the eye.
2. In dentistry, the canine and incisor teeth.
See also: segment

an·te·ri·or seg·ment

(an-tērē-ŏr segmĕnt) [TA]
Delimited part or section of an organ or other structure that lies in front of or ventral to similar parts or sections.
References in periodicals archive ?
We combine a clinical grading scale and swept source anterior segment optical coherence tomography to describe the external and scleral bleb findings in the successful and failed procedure.
reported a significant decrease in mean ACD after Nd:YAG capsulotomy, as measured with pentacam anterior segment system.5 With using anterior segment optical coherens omography some authors found the increase in ACD, ACV and ACA.7,20 Different anterior segment analysing systems may be responsible for variations in results.
Outcomes of descemet stripping automated endothelial keratoplasty in toxic anterior segment syndrome after phacoemulsification.
Evaluation of anterior segment parameters in keratoconic eyes measured with the Pentacam system.
To the best of our knowledge, there have been no previous reports comparing the anterior segment morphology of JOAG patients and normal subjects.
100% correction was achieved in upper and lower anterior segment crowding, whereas, least improvement was observed in overbite.
These results are clinical relevant: first, because the anterior segment dimensions of this myopic study cohort were still greater
Severe pigment dispersion in anterior segment and in surgical wound area is a very rare complication of TASS and is not much reported.
His topics include the external segment of the eye, the anterior segment of the eye, neuro-ophthalmology, pediatric ophthalmology, strabismus, optics, and trauma.
Acute inflammatory process in the anterior segment, as opposed to chronic anterior uveitis, is rarely associated with significant macular edema, but subclinical retinal thickening has already been described [3,4].
The company is focussed on the anterior segment surgical business, including instruments for cataract and refractive surgery, glaucoma and corneal procedures, and for the ocular surface.
Objectives: To evaluate and compare anterior segment changes in patients taking alpha-1 ([alpha]1) blockers (tamsulosin, terazosin, doxazosin, alfuzosin) for benign prostatic hypertrophy, during drug intake and drug-free period, using ultrasound biomicroscopy (UBM).

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