Sentences with phrase «preserve night vision»
It seems like a red filter (to lower the intensity of light for a partner in the dark, and to preserve night vision) might be a useful option on a folio case like the ones reviewed; it could even magnetically lock into place to keep secure.
https://thewirecutter.com/
At the end of each of the arms is an LED light with three white settings of variable brightness and spread, together with a red light setting to preserve your night vision if you prefer.
Plus, the high levels of beta - carotene in carrots help preserve night vision.
Not exact matches
Two red LEDs provide a comfortable 1 lumen output and are suitable for preserving night - adjusted vision or preventing eye strain when viewing nearby objects.
For emergency signaling or to preserve your night - acclimated vision, choose the red light, which runs as a low - power flood or a flash.
Blueberries improve vision at night; Second World War British pilots ate blueberry preserves before flying night manoeuvres