So scientists presented various visualillusions to subjects, like one where two equal circles are often perceived as being different sizes.
因此科学家们向实验对象展现了多种的视觉错觉，比如，两个经常被认为大小不同的事实上相等的圆。
2
In this sense, art, illusions and visual science have always been implicitly linked.
从这个意义上来说，艺术，幻觉和视觉科学早已经悄悄地联系在一起。
3
Rather, they are the work of visual artists, who have used their insights into the workings of the visual system to create visualillusions in their pieces of art.