Determining the visual angle of objects in the visual field: an extended application of eye trackers. 来自 掌桥科研 喜欢 0 阅读量: 26 作者:CY Scovil,EC King,BEM Ast 摘要: Many eye-tracker systems display the point of central gaze fixation on video images of the viewed environment. We ...
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considerable differences occur among subjects in the pattern of aberrations, particularly for the dominating second-order aberrations;The third to tenth order Zernike aberrations increase with the visual angle,but the increscent magnitude decreases as the Zernike order increases;in despite of imperfect ...
The virtual search environment was arranged in a fixed layout that was consistent throughout the whole experiment (see Fig.1). A fixation cross was presented at\(0^{\circ }\)of horizontal and vertical angle straight ahead. At\(35^{\circ }\)(inner) and\(70^{\circ }\)(outer) left ...
visual angle of 5 minutes at a distance of 20 feet. At the distance at which a normal patient can see a line of letters on a Snellen eye chart, the widths of the lines on each letter subtend a visual angle of 1 minute, or one-fifth of the entire letter.6A fraction of 20/20−...
Eye movement is an essential component of visual perception. Eye movement disorders have been observed in many eye disease, and are thought to affect various visual performance in daily life. However, eye movement behaviors of the elderly with cataract a
eye contact- a meeting of the eyes between two people that expresses meaningful nonverbal communication; "it was a mere glance, but the eye contact was enough to tell her that he was desperate to leave" projection- the projection of an image from a film onto a screen ...
The stimulus presentation device was composed of two separated black tubes (approximately 13 cm in length) each with one white LED covered with a 4 × 4 diffuser plate at one end of the tube to form a stimulus size of ~18.2° visual angle to each eye. The centers of each tube ...
Visual field (with or without permitted eye motion) cannot be tested in non-human apes. We designed the present study in an attempt to overcome this limitation. The basic idea behind this study was to use an archetypal human orbit, the opening angle (OA) of which can be varied so that ...