Sentence examples for vision attenuation from inspiring English sources
Two affected males underwent ophthalmic examination; retinitis pigmentosa (RP) was diagnosed on the basis of night blindness beginning at an early age, decreasing visual acuity, progressive loss of peripheral vision, attenuation of retinal vessels and pigment disturbance on fundus examination.
Normal subjects could perform the orientation task using cone vision at 5 log attenuation and brighter luminance levels.
In the model, the tricolor angular frequencies are introduced to the spatial frequency response function of human color vision, and the effects of atmospheric attenuation and air screen brightness on color mixture are considered.
We hypothesized that FoF would mediate the association between vision loss and physical activity, which would be manifested by attenuation of the association between vision loss and physical activity in regression analyses.
These results suggested a detectable cone based vision in P4 and P5 with a threshold between 2 and 4 log attenuation (average threshold θ = 3.3 log) which would correspond to an approximate 2 log elevation compared to normal cone vision.
However, more research is certainly needed to test this hypothesis and explain the mechanisms ruling altered head accelerations and poor attenuation in PD, as well as the implications of poor head stability on vision and postural control.
Upon a further increase of the scene luminance by an additional 2 log units (~4 log attenuation), there was a clear increase in percent correct, indicating the onset of normal cone vision occurring between 6 and 4 log attenuation with the threshold being on average at 5 log attenuation (Fig. 2a).
The dimmest scene luminance (8 log attenuation from maximum) used in the current work was well within the range of normal scotopic vision.
Therefore, the distance-dependent attenuation of contrast experienced in fog is obviously very different from the uniform reduction traditionally adopted in vision research.
