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Message: <blockquote data-quote="elkcub" data-source="post: 1515507" data-attributes="member: 14473">Hmmm.  Going back to your earlier statement, you may not be strictly referring to tunnel vision, which is generally accepted as resulting from limiting the peripheral view.  My only contribution to that, in the case of binocular usage, is the speculation that limited peripheral stimulation, rather than a limited image, may be the trigger for the percept.  That could be verified in a psychophysics lab with controlled apparatus.  For all I know there could also be large individual differences.  I don't follow how the rigidity/flexibility of the eyecups relates to perceived size of the apparent field, except for possibly allowing more light to enter around the edges; but I may be experiencing tunnel thinking again.  As for myself, at this point I'm going back and forth with eyeglasses.  In the process I've become rather aware of perceptual changes, and associated preferences.  The Zeiss 7x42, for example, is phenomenal with glasses and less so without.  Same with the 8x32SE.  The reverse is true of the 804.  Regards,Ed</blockquote>