The problems associated with vision through mesh window screening materials are discussed and a laboratory experiment using a 1/8th replicate 2th factorial design is described which shows the relative effects on vision of main effects and first-order interactions. Two criteria of visibility were used: a Landolt ring, measuring changes in visual acuity, and paired ratio scaling giving direct magnitude estimates of “ease of seeing” through the material. The laboratory results were validated in a short field experiment in which the effects on visibility of three isolated variables was determined by paired comparisons. Some suggestions for future experiments are also discussed.
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