Objects appear in the viewport and preview render, but not in the outliner or final render I don't understand what happened. Before when I saved the file it worked fine, but when I came back and reopened it, this problem started happening. (It is most visible with the character's eyes.)



The object is visible in the viewport, but it appears nowhere in the outliner. (Yes, I have scrolled down through the entire outliner to check.)
The objects even appear in the preview render and work fine there,(Sorry I couldn't post more than 2 pictures.) but once I press F12 for the final render the objects completely disappear.



I am using cycles render. I am hoping someone might be able to help me, I have searched a lot, but have not been able to find an answer to my problem anywhere.
As mentioned in the comments, you most likely have the eyes set as not visible in the render. This is shown in the outliner with the camera to the right of the object, the eye is for viewport visibility, which also effects viewport preview rendering while the camera only affects the final render.

To find an item in the outliner you have a few options, if they are named well you can search for them -



If you haven't named things, you can select it in the viewport and the item will be highlighted in the outliner, with a large list of items press . with the mouse over the outliner to zoom to the item, this will expand any parent objects to show the item.



Once you locate the object in the outliner, click the camera to make it visible in the render.