Pharaoh decreed (5:7-8) לעם תבן לתת תאספון לא תבן להם וקששו ילכו הם שלשם כתמול הלבנים ללבן, "We will no longer provide straw to the nation to make bricks, as we did yesterday and the days before that. Instead, they will go around [the country] to gather straw." Rebbe Yaakov Yosef of Skver zt'l explained that Pharaoh's main goal was ילכו, that the Jewish nation would need to walk around the streets of Mitzrayim. He knew that if their eyes became contaminated, he would have the power to rule over them.
As it states (Yeshayah 27:6) ישראל ופרח יציץ, tzaddikim explain, יציץ, if one looks (where he shouldn't) ישראל ופרח, his Judaism flies out of him.
In contrast, it states (Yeshayah 49:18) סביב שאי לך באו נקבצו כולם וראי עיניך. The pasuk is saying עיניך סביב שאי, look away from forbidden sights, לך באו נקבצו כולם וראי, and you will see that the many malachim you created with these good deeds are going with you to protect you.
