In the dark, aberrations are of negligible significance, so that a person is concerned only with allowing as much light into the eye as possible; in bright light high visual acuity is usually required, and this means reducing the aberrations.
Rod photoreceptors enable dim light vision, whereas cone photoreceptors mediate color vision and high visual acuity under brighter light conditions.
The symptoms of achromatopsia, which also include reduced visual acuity and severe photophobia, or sensitivity to bright light, became common on the island.
But with this heroic breeding and, of necessity, inbreeding new problems arose". The symptoms of achromatopsia, which also include reduced visual acuity and severe photophobia, or sensitivity to bright light, became common on the island.
The cones, which function in bright light conditions and are responsible for color vision and acuity, are stained red.
His diary entry for June 12 does not overwhelm with its acuity ("I was surprised that we traveled in bright sunshine for about 8 of the 8 1/2 hour flight. It didn't get dark until a little less than an hour out and yet it was after 3 A.M. back where we left").
"The imagination works overtime watching the acuity of these talented filmmakers," Janet Maslin wrote in The New York Times, "and wondering what bright idea they'll have next".
In bright light, these include bleaching afterimages and adaptation afterimages, while in dark conditions these include desaturation, loss of acuity, mesopic hue shift, and the Purkinje effect.
More sophisticated political scientists and legal scholars than I can parse Kennedy' speech with far greater acuity and pinpoint possible weak points in its argument, but there really are no permanent and definitive bright lines demarcating church and state in American society, try as we might to outline them.
Nystagmus and sensitivity to bright light develop within a few weeks after birth and although these can improve slightly over time, poor visual acuity (20/200 or less) remains stable throughout life (1– 3).
