Send to

Choose Destination
Invest Ophthalmol Vis Sci. 2018 Apr 1;59(5):2015-2023. doi: 10.1167/iovs.17-23705.

Long Anterior Lens Zonules and Intraocular Pressure.

Author information

Illinois Eye Institute, Illinois College of Optometry, Department of Clinical Education, Chicago, Illinois, United States.
University of Illinois at Chicago, School of Medicine, Department of Ophthalmology and Visual Sciences, Chicago, Illinois, United States.
University of Illinois at Chicago, School of Public Health, Division of Epidemiology and Biostatistics, Chicago, Illinois, United States.



To investigate the relation between intraocular pressure (IOP) and the idiopathic long anterior zonule (LAZ) trait.


Patients presenting for primary eye care were examined for LAZ, identified as radially oriented zonular fibers with central extension >1.0 mm beyond the normal anterior lens insertion zone (estimated via slit lamp beam length). Ocular, systemic health, and lifestyle data were collected via comprehensive exam and questionnaire. Multivariate regression was used to assess the relationship between IOP (Goldmann) and LAZ.


There were 2169 non-LAZ and 129 LAZ subjects (mean age: 49.8 ± 15.0 vs. 62.6 ± 10.2 years; 63.6% vs. 76.0% female; 83.2% vs. 91.5% African American). Right eyes with >trace LAZ (n = 59 of 110) had higher unadjusted mean IOP than control eyes (16.4 ± 3.3 vs. 15.0 ± 3.3 mm Hg, P = 0.005), and with control for numerous factors, LAZ eyes had an average IOP of approximately 1.3 ± 0.4 mm Hg higher (P = 0.003) than non-LAZ eyes. Final model covariates included sex (P = 0.001); spherical-equivalent refractive error (D; P < 0.0001); body mass index (kg/m2; P < 0.001); presence of diabetes (P < 0.001); having >high school education (P < 0.001); systolic blood pressure (mm Hg; P < 0.0001); being an ever smoker (P = 0.006); and having history of any site cancer (P = 0.01).


The LAZ trait, with potential prevalence near 2%, was associated with a higher IOP. This observation is consistent with the hypothesis that the trait is a marker for underlying mechanisms that elevate glaucoma risk.

[Indexed for MEDLINE]
Free PMC Article

Supplemental Content

Full text links

Icon for Silverchair Information Systems Icon for PubMed Central
Loading ...
Support Center