|
| Study | Participants | Accommodative task | Outcome measures | Tonometry method | Main result |
|
| Armaly and Rubin [5] | 10 healthy subjects with best corrected visual acuity (BCVA) of at least 20/20 divided into two age groups (20–25 and 45–55 years) | View a target at 25 cm with variable lenses to induce variable magnitudes of accommodation | Minute-by-minute IOP measurements with variable durations of accommodation and relaxation | Goldmann applanation | Younger and older age groups had mean maximum reductions in IOP of 4.5 mm Hg and 2.3 mm Hg, respectively |
|
| Mauger et al. [8] | 30 young (aged 22 to 35 years), healthy subjects with BCVA of at least 20/20 divided into three groups (mean age not reported) | View a single row of 6/6 letters with either no lens (group 1), a −4.0 D lens (group 2), or a −1.5 D lens (group 3) added at 2.5 minutes to induce varying amounts of accommodation | IOP at baseline and at 3 and 6 minutes | Goldmann applanation | At 3 and 6 minutes, groups 1–3 had respective IOP changes of 0 and 0.35 mm Hg, −1.32 and −2.38 mm Hg, and −1.15 and −2.15 mm Hg |
|
| Cassidy et al. [9] | 20 volunteers with newly diagnosed primary open angle glaucoma divided into two groups (mean age of 66 years) | Read for ten minutes | Group A: IOP at baseline and after 10 minutes of reading
Group B: IOP at baseline and after 10 minutes of watching television at 6 meters | Goldmann applanation | IOP of groups A and B decreased by 2.5 and 0.35 mm Hg, respectively, and IOP of all group A subjects decreased with 9 of 10 decreasing by at least 2 mm Hg |
|
| Read et al. [16] | 15 myopic and 17 emmetropic healthy adults (mean age of 23 years) | View an n10 size letter to induce 3 D of accommodation | IOP at baseline and after 2 minutes of near work | Pascal dynamic contour tonometer | IOP decreased by 1.8 mm Hg in both groups |
|
| Jenssen and Krohn [7] | 33 healthy volunteers with BCVA averaging 1.2 (mean age of 24 years) | View Lang fixation cube to induce 3 D of accommodation | IOP at baseline, after 10 minutes of far work, and after 3 minutes of near work (static); on a subsequent day, IOP at baseline and after 3 minutes of rapidly alternating between near and far work (repeated) | Goldmann applanation | IOP decreased from baseline after both static and repeated accommodation with mean reductions in IOP of 1.76 and 2.06 mm Hg, respectively |
|
| Yan et al. [17] | 46 progressing myopes and 40 emmetropes with BCVA of at least 20/20 (mean age of 24.6 years) | View first-line test object on visual chart at 5 m through 3 D lens until clear; repeat with 6 D lens | IOP at baseline (relaxation of accommodation induced by −3 D lens) and IOP after 3 D and 6 D accommodative tasks; anterior chamber anatomical measurements performed | iCare rebound tonometer | IOP increased in progressing myopes (0.8 and 1.02 mm Hg after 3 and 6 D lenses, respectively) but no significant change in emmetropes; in both, anterior chamber depth and angle decreased and lens thickened |
|
| Liu et al. [11] | 270 myopes and 48 emmetropes with BCVA of at least 20/20 (mean age of 19.4 years) | View a visual chart at 5 meters with a −3 D lens on subjects’ fully corrected lenses | IOP at baseline and after 3 minutes of accommodation, which began after the subject reported subjective resolution of the target after the addition of the −3 D lens | iCare rebound tonometer | No significant IOP change after accommodation in progressing myopes, stable myopes, and emmetropes |
|
