|
KMID : 1813520180070020050
|
|
Journal of the Korean Glaucoma Society
2018 Volume.7 No. 2 p.50 ~ p.55
|
|
|
Anterior Chamber Angle Change while Reading or Writing on Smartphone under Low-Light Condition
|
|
Ha Ah-Nul
Kim Jin-Soo
Park Young-Joo
Jeoung Jin-Wook
Park Ki-Ho
Kim Young-Kook
|
|
|
Abstract
|
|
|
Purpose
To determine the effect of smartphone reading or writing in terms of anterior chamber (AC) angle changes under a low-light condition.
Methods
Baseline anterior-segment optical coherence tomography (AS-OCT) imaging with the subject dark-adapted for 5 minutes was performed. Then, the participants were instructed to conduct 15 minutes of standardized work (i.e., reading of sample text on single mobile device and typing it on same device) under a low-light (100 lux) condition. The same lighting condition and scan protocols were applied for post-smartphone-work AS-OCT imaging. Additionally, three intraocular pressure (IOP)-measurement sets by rebound tonometer were performed: 1) pre-work (baseline), 2) during smartphone work (5, 15, and 25 minutes), and 3) post-work (5 and 15 minutes).
Results
The mean IOP after 5 minutes of smartphone work was significantly increased (from 13.9 ± 1.9 to 15.5 ± 1.7 mmHg; +12.0%; p = 0.03), which increase was sustained through the course of subsequent work: 17.6 ± 2.1 (+27.0%) at 15 minutes' work; 17.1 ± 1.7 mmHg (+23.7%) at 25 minutes' work (p < 0.001 at both points). After 15 minutes of smartphone work, the average trabecular-iris space area (TISA750) and angle-opening distance (AOD750) on AS-OCT had decreased: from 0.22 to 0.19 mm2 (p < 0.001) and from 0.57 to 0.41 mm (p < 0.001), respectively. Meanwhile, the average iris thickness (IT750) and iris curvature values had increased: from 0.50 to 0.54 mm (p < 0.001) and from 0.20 to 0.22 mm (p = 0.001), respectively.
Conclusions
In healthy young subjects, IOP fluctuation occurred under a low-light condition during work on a smartphone. This phenomenon possibly is associated with temporary alterations of AC angle structure.
|
|
|
KEYWORD
|
|
|
Smartphone, Anterior chamber angle, Intraocular pressure, Low-light condition
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|
|