The rapid shift from light to dark causes a drastic shift in the way our eyes view colors, something that typically happens gradually. The Purkinje effect will abruptly cause red shades to look ...

A person may notice pinpoint dots ... that are red, white, or the same color as the surrounding skin. It most often affects the outer parts of the upper arms and thighs. It can also affect the ...

The Trijicon MRO,, its Miniature Rifle Optic, set a standard for wide field-of-view red-dot rifle optics with exceptional ...