OK, double click on the camera ball, this will pop up the properties palette. The hither setting is on there. Reduce this to zero.

If this doesn't fix it, go into Render Settings, Preview tab, and change the display engine to Sree3d. This may also help.

If neither of these works, please post a render showing the problem.

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"you are terrifying
and strange and beautiful
something not everyone knows how to love." - Warsan Shire