A common example would be faint stars that can’t be seen unless you’re looking at a point a couple degrees away. But I just experienced this phenomenon with a random object under my kitchen sink when retrieving a dishwasher tablet in very low light.
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Faint objects are more visible when we’re moving our eyes (in “saccades”) across the visual landscape. So I wonder if the effect you noticed was not because of you looking slightly away but because of the resultant saccades.
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