Loading...



  • rods
  • Dark-adapted vision in humans is basically devoid of colour because it depends almost entirely on the functioning of rods. (britannica.com)
  • When a larger test spot is used during dark adaptation, a rod-cone break would be present since the test spot stimulates both cones and rods. (org.es)
  • As the test spot becomes even larger, incorporating more rods, the sensitivity of the eye in the dark is even greater (figure 6), reflecting the larger spatial summation characteristics of the rod pathway. (org.es)
  • Rod sensitivity improves considerably after 5-10 minutes in the dark, but rods take about 30 minutes of darkness to regenerate photoreceptors and reach full sensitivity. (wikipedia.org)
  • The rods are not saturated by the bright red light because they are not sensitive to long-wavelength light, so the crew members remain dark adapted. (wikipedia.org)
  • This is due to cones obtaining more sensitivity when first entering the dark for the first five minutes but the rods taking over after five or more minutes. (wikipedia.org)
  • Changes in the sensitivity of rods and cones in the eye are the major contributors to dark adaptation. (wikipedia.org)
  • A year later, researchers found that mice without any rods or cones, the cells involved in image-forming vision, still entrained to a light-dark cycle. (wikipedia.org)
  • Varying
  • Varying rates or speed of adaptation is an important indicator for tracking different rates of change in the environment or the organism itself. (wikipedia.org)
  • luminance
  • This can be measured by placing a subject in a dark room, and increasing the luminance of the test spot until the subject reports its presence. (org.es)
  • The Purkinje effect (sometimes called the Purkinje shift or dark adaptation) is the tendency for the peak luminance sensitivity of the human eye to shift toward the blue end of the color spectrum at low illumination levels. (wikipedia.org)
  • objective
  • Nevertheless, a high dose of oral vitamin A taken for at least 14 days did not provide any objective improvement in dark-adaptation function in five such patients. (ovid.com)
  • experiments
  • In pilot experiments with two early and two intermediate AMD patients, dark adaptation was measured at 5° (adjacent to the fovea) and 12° (just outside the macula). (arvojournals.org)
  • In pilot experiments, intermediate AMD patients who exhibited essentially no dark adaptation in 20 minutes when bleached with a relatively strong flash (≥ 82% effective bleach) had a rod intercept ≤ 20 minutes when bleached with a weaker flash (≤ 56% equivalent bleach). (arvojournals.org)
  • In the 1890s, psychologist George M. Stratton conducted experiments in which he tested the theory of perceptual adaptation. (wikipedia.org)
  • thus
  • By delivering an increased amount of vitamin A to the RPE, it might be possible to overcome a relative deficiency of vitamin A utilization or transport, and thus improve rod dark adaptation. (ovid.com)
  • Thus, dark adaptation is faster at the edge of the macula compared to the fovea. (arvojournals.org)
  • WIRE
  • In recent years we've seen how long stories on television, whether adaptations ( Game of Thrones ) or original ( The Sopranos , The Wire ), can reach depths of characterization and heights of suspense by taking the time for events to make their proper impact and for consequences to unravel. (deadline.com)
  • mechanism
  • Four factors affect dark adaptation: Intensity and duration of the pre-adapting light By increasing the levels of pre-adapting luminances, the duration of cone mechanism dominance extends, while the rod mechanism switch over is more delayed. (wikipedia.org)
  • cones
  • When a small test spot is used during dark adaptation, a single branch is found as only cones are present at the fovea. (org.es)
  • humans
  • In order for humans to transition from day to night vision they must undergo a dark adaptation period in which each eye adjusts from a high luminescence setting to a low luminescence setting. (wikipedia.org)
  • There exist many ways in which humans can accelerate the dark adaptation period and therefore gain full vision in low luminescence settings in a shorter period of time. (wikipedia.org)
  • vision
  • visual purple) are involved in dark vision. (britannica.com)
  • for better vision in a dark environment. (britannica.com)
  • The ultimate goal is to facilitate clinical trials for development of early-stage interventions by validating dark adaptation as a surrogate marker for future vision loss in AMD. (arvojournals.org)
  • Submarines are well lit to facilitate the vision of the crew members working there, but the control room must be lit differently to allow crew members to read instrument panels yet remain dark adjusted. (wikipedia.org)
  • vitamin
  • These findings do not rule out the posssiblity that a delay in rod dark adaptation in Stargardt's dystrophy results from an inability to transport vitamin A from the RPE to photoreceptor cells. (ovid.com)
  • Tower
  • Variety stressed that as of last night, The Dark Tower was still in development at Universal, Javier Bardem was inches away from being signed, sealed and delivered to play Roland, and scripting was still underway. (syfy.com)
  • Will The Dark Tower still go forward, and can the first movie still meet its May 17, 2013, release date? (syfy.com)
  • colour
  • Fruits and vegetables containing high amounts of carotenoids are dark green, yellow, orange, and red in colour. (wikipedia.org)
  • test
  • In order to perform this test, the child is asked to sit in the dark for a half-hour. (wikipedia.org)
  • environment
  • In addition, nightlights may be useful in locations other than sleeping areas, such as hallways, bathrooms, or kitchens, to allow late night trips to be made without turning on the full light, while preserving a dark sleeping environment. (wikipedia.org)
  • green
  • For instance, in bright sunlight, geranium flowers appear bright red against the dull green of their leaves, or adjacent blue flowers, but in the same scene viewed at dusk, the contrast is reversed, with the red petals appearing a dark red or black, and the leaves and blue petals appearing relatively bright. (wikipedia.org)
  • populations
  • We thus conclude that differently from HLA-A, for which supertype and allelic variation show similar patterns of nucleotide diversity within and between populations, HLA-B has likely evolved through specific adaptations of its B pocket to local pathogens. (springer.com)
  • film
  • Kamen Rider W Forever: A to Z/The Gaia Memories of Fate (仮面ライダーW(ダブル) FOREVER AtoZ/運命のガイアメモリ, Kamen Raidā Daburu Fōebā Ē tu Zetto/Unmei no Gaia Memori) is the second film adaptation of the Kamen Rider W television series, directed by Koichi Sakamoto and released in Japanese theaters on August 7, 2010. (wikipedia.org)
  • Hamlet is a 1969 British film adaptation of Shakespeare's play Hamlet, starring Nicol Williamson as Prince Hamlet. (wikipedia.org)
  • The film, a departure from big-budget Hollywood renditions of classics, was made with a small budget and a very minimalist set, consisting of Renaissance fixtures and costumes in a dark, shadowed space. (wikipedia.org)
  • Josh Lawson as Aiden Emma Lung as Virginia Ron Perlman as Pete Edward Furlong as Ravi Christopher Stapleton as Barry Jordan Trovillion as Young Emily Lauzirika came up with the idea for Crave while working on an unrelated film, an adaptation of Phillip K Dick's I Hope I Shall Arrive Soon. (wikipedia.org)
  • He is best known for his book Touching the Void and the 2003 film adaptation of his book. (wikipedia.org)
  • Black
  • Black mangabeys tend to have dark skin and eyelids that match their facial skin. (zooboise.org)
  • Plumage colouration varies with the majority having mainly dark plumage, some species being black and white, and a few being colourful. (wikipedia.org)
  • The males have black and dark brown plumage, an erectile crest on the nape and a larger bill than the female. (wikipedia.org)
  • Morphological plasticity, incrustation of the cell wall with melanins and presence of other protective substances like carotenoids and mycosporines represent passive physiological adaptations which enable black fungi to be highly resistant against environmental stresses. (wikipedia.org)
  • Presence of 1,8-dihydroxynaphtalene melanin in the cell wall confers to the microfungi their characteristic olivaceous to dark brown/black colour. (wikipedia.org)
  • In recent years, black fungi such as E. dermatitidis or Hortaea werneckii have attracted increasingly attention as model microorganisms in studies on astrobiology, bioremediation of polluted ecosystems by biofiltration, effect of ionizing radiations in contaminated area, biodeterioration of materials, and mechanisms of adaptation to high salt concentrations. (wikipedia.org)
  • made
  • This instrument was built especially for mice and offers several advantages over adaptation of "made for rat" instruments. (gentechmd.com)
  • Rubio studied theater and photography throughout his high school years in California, and made his directorial debut at the age of 17 with a stage adaptation of Robert Redford's Ordinary People. (wikipedia.org)
  • Rubio has made a living since as a freelance writer and award-winning promotion producer, and has written comic books for Dark Horse's successful Star Wars Tales line. (wikipedia.org)
  • The cockroach made many adaptations over the years to be able to survive the major die-offs to which many species succumbed. (wikipedia.org)
  • effort
  • In the episode "Separation," the Sorceress tells He-Man that long ago Hordak and his minions used the Triad of Discidium to create the Dark Hemisphere in an effort to give his army a place to grow and thrive. (wikipedia.org)