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Official Journal of the Japan Wood Research Society

Journal of Wood Science Cover Image

Table 1 Test procedure

From: Reducing eye fatigue through the use of wood

Before test Give test subjects an overview of examination and obtain their consent
Practice measuring NPD using a near-point ruler
First test (1) Subjective symptoms investigation of eyes and head before gaze
(2) NPD measurement before gaze
(3) Gaze at target material (30 min)
(4) NPD measurement after gaze
(5) Subjective symptoms investigation of eyes and head after gaze
Pause 2-h break or resume another day
Second test (1)–(5) above examined for another target material
Pause 2-h break or resume another day
Third test (1)–(5) above examined for the final target material
Rank three target materials for visual contact by degree of eye fatigue and headaches they produce
  1. The order of presentation of three target materials was randomized
  2. NPD near-point distance