J Korean Ophthalmol Soc.  2021 Jan;62(1):85-90. 10.3341/jkos.2021.62.1.85.

Biometric Characteristics in Eyes with Pseudoexfoliation Syndrome and Eyes with Acute Angle Closure

• Oh HY
• Lee MY
• Lee YC
• Shin HY

• KMID: 2511528
• DOI: http://doi.org/10.3341/jkos.2021.62.1.85

Abstract

Purpose
To investigate the biometric characteristics of eyes with pseudoexfoliation syndrome (PEX) according to the anterior chamber depth (ACD) by comparing them to patients with acute angle closure (AAC) and a control group.
Methods
A total of 130 eyes of 121 subjects (PEX, 49 eyes; AAC, 28 eyes; and control, 53 eyes) were included in the study. Axial length (AL), ACD, and lens thickness (LT) were measured with an IOL Master^® 700 (Carl Zeiss Meditec, Jena, Germany). The total PEX (PXall) group was divided into a PEX with deep ACD group (PXd) and a shallow ACD group (PXs) based on an ACD of 2.70 mm. We compared the biometric results among the PXall, PXd, PXs, AAC, and control groups.
Results
There was no significant difference in AL between the PXall and control groups; however, the PXall group had a shallower ACD and thicker lenses. After dividing the PXall group into two groups based on ACD, the PXd group showed no difference in LT compared to the control group (p = 0.113). The LT of the PXs group was thicker than those of the PXd and control groups (p < 0.001 and p < 0.001, respectively). The PXs group had longer ALs than the AAC group (p = 0.025); however, there was no difference in LT or in the ratio of LT to AL (p = 0.222 and p = 0.076, respectively).
Conclusions
The biometric characteristics were different in eyes with PEX based on ACD. PEX patients with deep ACDs showed no difference in biometry compared to the control group; however, PEX patients with shallow ACDs showed characteristics of a thick LT, similar to AAC patients. There was no difference in the ratio of LT to AL among groups.

Keyword

Acute angle closure, Anterior chamber depth, Lens thickness, Ocular biometry, Pseudoexfoliation syndrome