Use left pairs for crossed vision; use right pairs for straight vision.
Use top pairs for crossed vision; use bottom pairs for straight vision.
| R |
| R |
| L |
Metal sculpture at the Smithsonian Institute in Washington, District of Columbia.
| R |
| L |
| L |
| R |
Headstones in a graveyard.
| R |
| L |
| L |
| R |
Double covered bridge in Philippi, West Virginia.