I have (cheap) Quantum Pro V2 and (cheap) Eachine VR D2. Both from Hobbyking. They are both the shoebox style as opposed to small, easy to transport goggles. You need to be near sighted to avoid eye strain with them the way they come. Even young people would hurt their eyes if they used them regularly. Both need to be longer to allow comfortable focusing.
The way they come, the Quantums are larger, but I lengthened the Eachines so they are fairly long now too.
The Quantum allows mounting the monitor outside the case (undocumented) to give a little focusing help in combination with using both lenses. It really needs a bit more though. Some people wear glasses with them and there is a little room for glasses. It has a stocking holding it's two halves together. That doesn't work so well when transporting them.
The Eachines don't really have enough room inside for glasses.
The Eachines I had to cut in half and lengthen by 95mm to get comfortable viewing, but considering it has a receiver with diversity, an integrated DVR (with playback at different speeds),
now it focuses with zero eye strain, all the control buttons are there for the receiver, DVR, and display without a rat's nest of wiring, I can't really imagine anything being better for me until someone comes out with some goggles with a large, clear image and at a decent price. They are All-In-Ones though, there are no external inputs/outputs and no speakers and
no channel scan.
https://www.rcgroups.com/forums/showpost.php?p=36570916&postcount=3010