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Article Abstract
Prcis: Shorter axial length was associated with the absence of the attachments between the posterior insertion zone of the vitreous zonules and the posterior lens equator. Primary angle closure disease eyes without vitreous zonules had a more anteriorly rotated ciliary body.
Purpose: To assess the clinical significance of the attachments between the posterior insertion zone of the vitreous zonules and the posterior lens equator (PVZ INS-LE strands) and vitreous zonules (VZ) in primary angle closure disease (PACD).
Methods: This cross-sectional study consisted of 90 PACD and 30 cataract eyes from an eye clinic. PVZ INS-LE strands, VZ, and anterior segment parameters were assessed by ultrasound biomicroscopy (UBM). The presence of PVZ INS-LE strands and VZ was compared between groups. Baseline ocular characteristics and UBM parameters were compared among PACD eyes. Factors associated with the absence of PVZ INS-LE strands and VZ were identified.
Results: Forty percent of control eyes and 71.1% of PACD showed PVZ INS-LE strands absent. PACD 22.2% and no control eyes showed VZ absent. PVZ INS-LE strands absent group had shorter axial length ( P =0.018), larger ciliary-ciliary angle ( P =0.010), and smaller trabecular-ciliary process distance at 750 μm ( P =0.022). Shorter axial length was independently associated with absence of PVZ INS-LE strands (OR=2.230; 95% CI: 1.027-4.838; P =0.043). VZ absent group had larger ciliary-ciliary angle ( P <0.001), smaller trabecular-ciliary angle ( P =0.040), shorter iris-ciliary process distance at 750 μm ( P =0.092), and shorter trabecular-ciliary process distance at 750 μm ( P =0.026).
Conclusions: PVZ INS-LE strands were less likely to be seen in APACD and their fellow eyes. All types of PACD eyes had less presence of VZ. PACD eyes without VZ appeared to have more anterior rotation of the ciliary body. Shorter AL was independently associated with the absence of PVZ INS-LE strands.
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| http://dx.doi.org/10.1097/IJG.0000000000002577 | DOI Listing |
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Prcis: Shorter axial length was associated with the absence of the attachments between the posterior insertion zone of the vitreous zonules and the posterior lens equator. Primary angle closure disease eyes without vitreous zonules had a more anteriorly rotated ciliary body.
Purpose: To assess the clinical significance of the attachments between the posterior insertion zone of the vitreous zonules and the posterior lens equator (PVZ INS-LE strands) and vitreous zonules (VZ) in primary angle closure disease (PACD).
Zonulopathy and Its Relation to Primary Angle Closure Disease: A Review.
J Glaucoma
December 2024
Joint Shantou International Eye Center of Shantou University and The Chinese University of Hong Kong, Shantou, Guangdong, China.
Prcis: This paper aims to discuss the anatomical features of zonule fibers that center the lens in the eye and summarizes the relationship between zonulopathy and PACD.
Abstract: The increasing lens vault (LV) and lens thickness (LT) is a recognized mechanism for primary angle closure glaucoma (PACG). Zonulopathy, causing the abnormal lens position, is an important factor in this mechanism.
Accommodative movements of the lens/capsule and the strand that extends between the posterior vitreous zonule insertion zone & the lens equator, in relation to the vitreous face and aging.
Ophthalmic Physiol Opt
January 2016
Department of Ophthalmology and Visual Sciences, University of Wisconsin-Madison, Madison, USA.
Purpose: To elucidate the dynamic accommodative movements of the lens capsule, posterior lens and the strand that attaches to the posterior vitreous zonule insertion zone and posterior lens equator (PVZ INS-LE), and their age-related changes.
Methods: Twelve human subjects (ages 19-65 years) and 12 rhesus monkeys (ages 6-27 years) were studied. Accommodation was induced pharmacologically (humans) or by central electrical stimulation (monkeys).