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目标:一直都有所记录的事实是:弱视者的视力和对比敏感度在高空间频率下都被削弱,这就显示了弱视者看东西应该是模糊的。因为他们没有反映足够清晰边角所必需的高空间频率的资料。在我们的研究中,我们用模糊辨别和模糊配对的任务来探索弱视者的模糊视觉表现。方法:我们测量了单眼模糊辨别的阈值,受试者要求辨别那一边的边界(左或右)没那么模糊。他们同时用两眼分视的方法用好眼把边界调整到与差眼看的视标(目标图)相同的模糊度。结果:弱视眼和健眼的模糊辨别阈值都有所升高,但两眼配对的阈值就在正常范围内。总结:结果显示弱视者视觉系统里的不确切视觉表现有模糊的现象。但令人惊讶的是所有弱视者,甚至那些重度患者,都能正确配对所有的模糊边界,包括最清晰的边界。这就暗示了弱视者能正确反映一定程度的模糊,并定义这一模糊程度的空间结构是超出他们的辨别能力的。
Goals: There is always a documented fact that the vision and contrast sensitivity of the visually impaired are weakened at high spatial frequencies, suggesting that the visually impaired should look vague. Because they do not have the data to reflect the high spatial frequencies necessary for a sufficiently sharp corner. In our research, we explore the fuzzy visual representation of the visually-impaired by using the tasks of ambiguity discrimination and fuzzy matching. METHODS: We measured the threshold for monocular ambiguity discrimination, and the subject asked to discern the border (left or right) on that side from being less ambiguous. At the same time, they use the method of subdivision of the two eyes to adjust the border to the same degree of ambiguity as that of the visually-poor target (target map). Results: The blur discrimination threshold of amblyopic eyes and healthy eyes both increased, but the matching threshold of both eyes was within the normal range. Summary: The results show that the visual acuity in the visually impaired is blurred. However, it is surprising that all amblyopia, even those with severe cases, can correctly pair all the fuzzy boundaries, including the clearest one. This implies that the visually impaired people correctly reflect a certain degree of ambiguity and that the spatial structure that defines this degree of ambiguity is beyond their ability to discern.