They pass through the retina at a place called your blind spot. You cannot see anything in this spot, yet your brain does such a good job of filling-in that you may have never noticed your blind spot before. Close your right eye and look at the small white square with your left eye. Slowly move toward the screen until the black disk falls within your blind spot and disappears. Honesty in reporting is most important here.
Different people report different perceptions.
Many report that the lines continue across their blind spot, other report that the black disk disappears but that they cannot tell what happens to the straight lines. Let's explore how you see the world out of the corner of your eye. So you see things in color and with great clarity only in a small region of your field of view near the center. And yet, if your perception of the world is the same as mine, you perceive the world sharply across your field of view. For a change of pace let's move from the above activities which have all been explorations of images in space and look at the time response of your retina.