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Ultrasound biomicroscopy of the aging rhesus monkey ciliary region.
Optom Vis Sci 2001; 78(6):417-24OV

Abstract

Ultrasound biomicroscopy of the living rhesus monkey ocular ciliary region was undertaken to identify age-dependent changes that might relate to the progression of presbyopia. Monkeys were anesthetized and pharmacologically cyclopleged, the eyelids were held open with a lid speculum, and sutures were placed beneath the medial and lateral rectus muscles. Ultrasound biomicroscopy imaging of the nasal and temporal quadrants of the eye were performed, and the live images were recorded to videotape. Subsequent image analysis was performed to obtain objective morphometric measurements of the ciliary body region. The ciliary body inner radius of curvature, outer radius of curvature, inner arc length, area, thickness, perimeter, zonular fiber length, and circumlental space were measured. Zonular space was calculated. The circumlental space decreased with increasing age in the temporal quadrant. The other morphologic measurements were not significantly correlated with age or body weight. Most morphologic measurements were significantly different comparing temporal vs. nasal quadrants. Bifurcation of the posterior zonular fibers was frequently observed. Although temporal circumlental space was the only measurement found to change with age, ultrasound biomicroscopy of the living rhesus ciliary region did identify distinct nasal vs. temporal asymmetries, which may reflect anatomical requirements for convergence-associated accommodation.

Authors+Show Affiliations

College of Optometry, University of Houston, Texas 77004, USA. AGlasser@popmail.opt.uh.eduNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, P.H.S.

Language

eng

PubMed ID

11444631

Citation

Glasser, A, et al. "Ultrasound Biomicroscopy of the Aging Rhesus Monkey Ciliary Region." Optometry and Vision Science : Official Publication of the American Academy of Optometry, vol. 78, no. 6, 2001, pp. 417-24.
Glasser A, Croft MA, Brumback L, et al. Ultrasound biomicroscopy of the aging rhesus monkey ciliary region. Optom Vis Sci. 2001;78(6):417-24.
Glasser, A., Croft, M. A., Brumback, L., & Kaufman, P. L. (2001). Ultrasound biomicroscopy of the aging rhesus monkey ciliary region. Optometry and Vision Science : Official Publication of the American Academy of Optometry, 78(6), pp. 417-24.
Glasser A, et al. Ultrasound Biomicroscopy of the Aging Rhesus Monkey Ciliary Region. Optom Vis Sci. 2001;78(6):417-24. PubMed PMID: 11444631.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Ultrasound biomicroscopy of the aging rhesus monkey ciliary region. AU - Glasser,A, AU - Croft,M A, AU - Brumback,L, AU - Kaufman,P L, PY - 2001/7/11/pubmed PY - 2002/1/5/medline PY - 2001/7/11/entrez SP - 417 EP - 24 JF - Optometry and vision science : official publication of the American Academy of Optometry JO - Optom Vis Sci VL - 78 IS - 6 N2 - Ultrasound biomicroscopy of the living rhesus monkey ocular ciliary region was undertaken to identify age-dependent changes that might relate to the progression of presbyopia. Monkeys were anesthetized and pharmacologically cyclopleged, the eyelids were held open with a lid speculum, and sutures were placed beneath the medial and lateral rectus muscles. Ultrasound biomicroscopy imaging of the nasal and temporal quadrants of the eye were performed, and the live images were recorded to videotape. Subsequent image analysis was performed to obtain objective morphometric measurements of the ciliary body region. The ciliary body inner radius of curvature, outer radius of curvature, inner arc length, area, thickness, perimeter, zonular fiber length, and circumlental space were measured. Zonular space was calculated. The circumlental space decreased with increasing age in the temporal quadrant. The other morphologic measurements were not significantly correlated with age or body weight. Most morphologic measurements were significantly different comparing temporal vs. nasal quadrants. Bifurcation of the posterior zonular fibers was frequently observed. Although temporal circumlental space was the only measurement found to change with age, ultrasound biomicroscopy of the living rhesus ciliary region did identify distinct nasal vs. temporal asymmetries, which may reflect anatomical requirements for convergence-associated accommodation. SN - 1040-5488 UR - https://www.unboundmedicine.com/medline/citation/11444631/Ultrasound_biomicroscopy_of_the_aging_rhesus_monkey_ciliary_region L2 - http://dx.doi.org/10.1097/00006324-200106000-00014 DB - PRIME DP - Unbound Medicine ER -