| CPC G02B 27/0172 (2013.01) [G02B 27/10 (2013.01); G02B 2027/011 (2013.01)] | 25 Claims |

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1. A display system comprising:
a display to emit or transmit light; and
an optical subsystem optically coupled to the display and including a first optical feature that has optical focusing power in only a first dimension and a second optical feature that has optical focusing power in only a second dimension that is not parallel to the first dimension, the first optical feature and the second optical feature being collectively arranged to direct light rays so as to form a plurality of virtual images that appear to a viewer concurrently at a respective plurality of different depths.
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