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She's right, given recent reports revealing that light masks such as mine – despite selling in booming numbers and being touted as effective against the dangerous microparticle PM 2.5 – are in fact rather useless at filtering harmful pollutants.
The present within-subjects design administered green narrowband light via light masks to 17 young adults (23.2 ± 4.7 years) during four 90-minute afternoon naps.
Fragile VSTM representations were not affected by light masks, but were completely overwritten by irrelevant pattern masks that spatially overlapped the memory array.
Light masks were composed of uniform full-screen displays in red (13.52 cd/m2) or white (87.66 cd/m2) (Fig. 3b).
Iconic memory seemed to depend on the strength of the positive after-image resulting from the memory display and was virtually absent under conditions of isoluminance or when intervening light masks were presented.
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Although light has various alerting effects at night, 500 nm LED light presented via light mask does not appear to inhibit daytime sleep.
First, this optical design controls the angle of light pattern without light masking so as to achieve much higher light efficiency compared with traditional optical design for headlight systems.
The sun was a circle of light masked by red cellophane.
Conversely, the same light mask did not influence retro-cue aided VSTM performance.
We introduced a 10-ms light mask before the iconic-cue (Fig. 3d), a 250-ms light mask before the retro-cue or a 250-ms pattern mask before the retro-cue (Fig. 3e).
Moreover, light of sufficient intensity (such as during the light portion of the light/dark cycle) suppresses locomotor activity in nocturnal rodents in a process known as light masking [33].
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