My textbook states that if something i am looking at disappears for 0.1 second and appear again, I'll not able to perceive that it was not there for some moments. When an object build an image in my brain, the sense of vision lasts for one-tenth of a second. Doesn't it imply that if any other thing appear amidst of this interval and disappears- we will not able to be aware of their presence? Coz every image in our brain lasts for 0.1 second. Is'nt it right to assume that whatever we see must be present for 0.1 second in-front of our eye, to make visual perception?