FCAROLYN 3D Eye Patch for Kids - 2nd Generation(Right Eye/Black)

Picked this up for my almost 5 year old to help correct a lazy eye. The fit is good for his size, and the quality is decent enough. But the design is very uncomfortable. The strap is designed to go over the good eye, but in practice ends up slipping down on top of the good eye after a few minutes. The strap should be designed to diagonally go over the head to avoid having it slip in front of the good eye. Even after tightening it past the point of comfort, it still ended up slipping down after a few minutes.

It is slippery and slides right off your head