Abstract
Purpose: :
To investigate the associations among axial length, body height, and anterior chamber depth (ACD) in primary angle closure (PAC), and compare the gender differences of them.
Methods: :
Axial length and body height were measured in 186 Japanese subjects with PAC (male 47, female 139) and 190 Japanese normal controls (male 87, female 103). In addition, ultrasound biomicroscopy was performed in the subjects with PAC to measure the ACD. The associations between axial length and body height, and between axial length and ACD were examined, as well as their gender differences.
Results: :
In females, the subjects with PAC (mean height:149.2±7.1cm, mean axial length:22.0±1.2mm) had significantly short body height (p<0.05) and short axial length (p<0.01) as compared with the controls (150.9±5.9cm, 23.7±1.8mm), and the axial length positively correlated with the body height (p<0.01) in the subjects. In males, although axial length was significantly shorter (p<0.01) in the subjects with PAC (22.8±1.0mm) than in the controls(24.4±2.0mm), body height was not significantly different (p=0.208) between the subjects(162.5±6.3cm) and the controls(164.0±6.9cm). No significant correlation was found between the height and axial length in the male subjects (p=0.915). In subjects with PAC, although the males had significantly long (p<0.05) axial length (22.7±0.9mm) as compared with the females (22.1±0.9mm), the ACD was not significantly different (p=0.299) between the males (2.0±0.3mm) and the females (2.0±0.3mm).
Conclusions: :
It was suggested that short axial length associated with short body height directly contributed to PAC development in females. By contrast, in males, the anteriorly positioned lens surface appeared to play an important role in PAC development.
Keywords: anterior segment • anterior chamber