Fig 1.
Measurable area and starting locations with a moving stimulus at each meridian.
The Octopus 900 perimeter device can measure the area outlined by the dashed line. The starting locations with a moving stimulus at each meridian are depicted using the III4e stimulus as an example. The stimulus is presented randomly on each meridian from the extreme periphery of normal age-corrected kinetic sensitivity to the center. If the normal age-corrected kinetic sensitivity is outside the measurable area (dashed line), the starting location is set to the extreme end of the measurable area on the same meridian. The I4e, I3e, I2e, and I1e stimuli were also measured using the same method.
Fig 2.
Sealed clear plastic eye cover with applied white opacity filters (WOFs).
From left to right, non-WOF filter (Grade 0) and WOF densities of 0.8 (Grade 1), 0.4 (Grade 2), and 0.1 (Grade 3) are presented.
Table 1.
Demographic data and ocular characteristics of the participants.
Table 2.
Changes in the visual acuity, pupil diameter, and isopter area under each white opacity filter density.
Fig 3.
Kinetic sensitivity at each meridian of each stimulus under Grades 0 to 3.
Each plot was expressed as an average value for all participants. The mean visual acuity (logarithmic minimum angle of resolution, LogMAR) and mean kinetic sensitivity measured for each stimulus are shown in the lower middle and right, respectively. The symbols * and ** indicate that the kinetic sensitivity significantly decreased with p < 0.05 and 0.01 compared to the baseline Grade 0, respectively.
Fig 4.
Deterioration in the isopter area per 0.1 LogMAR unit at each stimulus.
Colored dots indicate deterioration in the isopter area per 0.1 LogMAR unit for each participant and the dotted lines indicate approximate straight lines.