Soanythingatthatpointinyourvision, youcan't see, akayourblindspot.
だから視界のその位置では何も見ることはできず、この点を盲点と呼びます。
Ifweadd a linethroughtheimageandyoutryagain, you'llnoticethatyourbrainfillsininformationandmakesyouthinkthelineiscontinuousinsteadoftherebeing a holeinyourvision.