A spectacle that protects from the suns gaze and also guides your eyes to comfortable sway

For exercise, you do me. As a punishment, you walk me. If you're dim-witted, you are me. What am I?

The shepherd’s staff denying its identity,

So earlier I made a riddle with a rather serious tone, And while looking at the stats below the most guessed words, there was one little number that shone, You know the one, the one on the right, a poor riddler that lost his riddling ways, I had a macabre chuckle, maybe he thought, due the riddle's dark theme, that was riddlin praise! Also answer

Okay, enough of that, I'm a purple and lime-green T-Rex, now Under the control of a spiritual healer who can't fully bow, That happens to be very good with kids... Obviously, this one is less serious