to view others with raised eyes
頣 centers on looking at others with a raised gaze, often implying a scrutinizing or observing attitude.
頣 combines 臣 (servant, minister, or eye) and 頁 (head), suggesting a head with an eye raised to look at others. The exact historical development is uncertain.
The left side 臣 looks like a wide eye, and the right side 頁 is a head. Imagine a head with a large eye raised to view others.
For シン, picture a scene where someone raises their eyes to view a shiny (シン) object held high: shiny -> シン, and the raised gaze follows it.