Changes in Iridocorneal Angle Configuration and Intraocular Pressure during Smartphone Use under Room Light
10.3341/jkos.2021.62.9.1252
- Author:
Seong Taik LEE
1
;
Su Jin PARK
;
Yong Koo KANG
;
Jae Pil SHIN
;
Dai Woo KIM
;
Dong Ho PARK
Author Information
1. Department of Ophthalmology, Kyungpook National University Hospital, School of Medicine, Kyungpook National University, Daegu, Korea
- Publication Type:Original Article
- From:Journal of the Korean Ophthalmological Society
2021;62(9):1252-1258
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
Purpose:To investigate changes in intraocular pressure (IOP) and iridocorneal angle (ICA) configuration during smartphone use under room light.
Methods:We included healthy adults aged 19-35 years with no ophthalmological abnormalities. All read text on a smartphone for 6 minutes under room light. IOP was measured via rebound tonometry at baseline and at 2, 4, and 6 minutes. ICA images were obtained via anterior segment optical coherence tomography after each IOP measurement. After 6 minutes, participants stopped reading text and rested for 2 minutes. IOP was then measured again.
Results:The IOP significantly increased at 2, 4, and 6 minutes of reading compared to baseline (p < 0.001) but recovered to baseline after 2 minutes of rest (p = 1.000). The anterior chamber depth decreased significantly, and the anterior chamber angle width increased after 6 minutes of smartphone reading (both p < 0.05).
Conclusions:IOP increased when reading smartphone text under room light but the ICA did not change. Prolonged smartphone reading is inappropriate for a patient at risk of glaucoma or glaucoma progression. Such patients should be cautioned.
