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KMID : 0360220210620091252
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Journal of the Korean Ophthalmological Society
2021 Volume.62 No. 9 p.1252 ~ p.1258
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Changes in Iridocorneal Angle Configuration and Intraocular Pressure during Smartphone Use under Room Light
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Lee Seong-Taik
Park Su-Jin
Kang Yong-Koo
Shin Jae-Pil
Kim Dai-Woo
Park Dong-Ho
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Abstract
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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.
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KEYWORD
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Accommodation, Anterior chamber, Intraocular pressure, Smart phone
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