Open AccessEffect of Near Work on Intraocular Pressure in Emmetropes
Author(s) -
Aaron Priluck,
Aidan B. Hoie,
Robin High,
Vikas Gulati,
Deepta Ghate
Publication year - 2020
Publication title -
journal of ophthalmology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 40
eISSN - 2090-0058
pISSN - 2090-004X
DOI - 10.1155/2020/1352434
Subject(s) - emmetropia , medicine , intraocular pressure , ophthalmology , repeated measures design , significant difference , optometry , refractive error , visual acuity , statistics , mathematics
Objective To determine whether accommodation induced by reading alters intraocular pressure (IOP) in healthy, young, emmetropic adults and to document the duration and magnitude of this effect.Design Cross-sectional study. Participants . Fifteen healthy, emmetropic young adults.Methods Subjects performed 20 minutes of near work (reading at 33 cm) followed by 20 minutes of far work (reading at 520 cm) while IOP was measured using an iCare tonometer at baseline and every 5 minutes thereafter. Statistical analysis was performed using repeated measures ANOVA. Main Outcome Measures . Intraocular pressure.Results IOP decreased significantly compared to baseline IOP after 10 minutes of near work (average change of −1.60 ± 2.2 (SD) mm Hg, p < 0.05). IOP remained lower than baseline IOP throughout all subsequent near and far work. The difference in IOP at the end of experimentation compared to baseline IOP was −1.87 ± 1.81 mm Hg ( p < 0.05). IOP remained lower than baseline IOP throughout all subsequent near and far work. The difference in IOP at the end of experimentation compared to baseline IOP was −1.87 ± 1.81 mm Hg ( Conclusions Near work decreases IOP in healthy emmetropes, and this effect is sustained for at least 20 minutes after discontinuing prolonged near work. Providers may need to consider this effect when measuring IOP in clinical practice.