Wolffe M
Dollond & Aitchison Training & Conference Centre, Birmingham, UK.
Ophthalmic Physiol Opt. 1995 Sep;15(5):471-4.
It is recognised that discrimination of fine detail is dependent on an intact macula with the peripheral retina being responsible for motion detection. There is evidence, however, to suggest that the peripheral retina does play a critical part in such discrimination. Studies of the performance of visually impaired school children have revealed levels of visual perception far exceeding anything that would be expected for individuals so severely handicapped. The art work of visually impaired youngsters was compared with the predicted results based on their visual acuity. The results showed detail that in theory could not have been resolved with such low acuity levels. All the youngsters had dense central scotomata. The peripheral retina, therefore, must have been involved in the discrimination of such detail. These results have implications not only for the visually impaired in terms of what they are capable of doing, but also for our understanding about the way the visual cortex processes information from the peripheral retina and the use that it makes of this relatively poor quality information.
人们认识到，对精细细节的辨别依赖于完整的黄斑，而周边视网膜负责运动检测。然而，有证据表明周边视网膜在这种辨别中确实起着关键作用。对视力受损学童表现的研究表明，他们的视觉感知水平远远超过了对如此严重残疾个体的预期。将视力受损青少年的艺术作品与基于他们视力的预测结果进行了比较。结果显示出理论上在如此低视力水平下无法分辨的细节。所有这些青少年都有密集的中央暗点。因此，周边视网膜必定参与了这种细节的辨别。这些结果不仅对视力受损者在其所能做的事情方面有影响，而且对我们理解视觉皮层处理来自周边视网膜的信息的方式以及对这种质量相对较差的信息的利用方式也有影响。
