Age and menopause effects on ocular compliance and aqueous outflow.
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Published version
Author(s)
Feola, Andrew J
Sherwood, Joseph M
Pardue, Machelle T
Overby, Darryl R
Ethier, C Ross
Type
Journal Article
Abstract
Purpose: Glaucoma is the second leading cause of blindness worldwide. Recent work suggests that estrogen and the timing of menopause play a role in modulating the risk of developing glaucoma. Menopause is known to cause modest changes in intraocular pressure; yet, whether this change is mediated through the outflow pathway remains unknown. Menopause also affects tissue biomechanical properties throughout the body; however, the impact of menopause on ocular biomechanical properties is not well characterized. Methods: Here, we simultaneously assessed the impact of menopause on aqueous outflow facility and ocular compliance, as a measure of corneoscleral shell biomechanics. We used young (3-4 months old) and middle-aged (9-10 months old) Brown Norway rats. Menopause was induced by ovariectomy (OVX), and control animals underwent sham surgery, resulting in the following groups: young sham (n = 5), young OVX (n = 6), middle-aged sham (n = 5), and middle-aged OVX (n = 5). Eight weeks postoperatively, we measured outflow facility and ocular compliance. Results: Menopause resulted in a 34% decrease in outflow facility and a 19% increase in ocular compliance (P = 0.011) in OVX animals compared with sham controls (P = 0.019). Conclusions: These observations reveal that menopause affects several key physiological factors known to be associated with glaucoma, suggesting that menopause may contribute to an increased risk of glaucoma in women.
Date Issued
2020-05-11
Date Acceptance
2020-03-17
Citation
Investigative Ophthalmology and Visual Science, 2020, 61 (5), pp.1-7
ISSN
0146-0404
Publisher
Association for Research in Vision and Ophthalmology
Start Page
1
End Page
7
Journal / Book Title
Investigative Ophthalmology and Visual Science
Volume
61
Issue
5
Copyright Statement
© 2020 The Authors. This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (http://creativecommons.org/licenses/by-nc-nd/4.0/).
Sponsor
Royal Academy Of Engineering
Identifier
https://www.ncbi.nlm.nih.gov/pubmed/32407519
PII: 2766110
Grant Number
BMPF_P67271
Subjects
Ophthalmology & Optometry
06 Biological Sciences
11 Medical and Health Sciences
Publication Status
Published
Coverage Spatial
United States
Date Publish Online
2020-05-14