While you are in the dark recesses, it is worth while to find a place to sit, then turn off your light and remain quiet for a while.  It will not take long till you will be convinced that you can see (You Can't).  Once this happens, "look" around you and you will think that you see the cave wall in all directions around you at about the distance you last saw the real wall.  This is the result of sensory deprivation.  Your body is turning up the gain of your senses, trying to gather data.  As it does so, your brain tries to make up for the lack of data by "approximation" and so, "you see the cave".

     Cover the lens of your flashlight with your hand as you turn it back on.  Otherwise, you will find the light uncomfortable.  Notice that even though you have the light mostly blocked with your hand, you are able to see more of the cave than you could with the unblocked beam.  Even the reduced amount of light restores reality to your visual system.  I like to start back out of the cave with my light dimmed in this way, so that I can see more of the surroundings and so that I can detect the light of coming from the entrances sooner.  It will appear as a gray haze, just beyond the area you can see as you come to the corner of the main entrance passage.  Be careful though, as there are several large jagged rock piles that you must either cross or maneuver around as you work your way out.  The rocks remain sharp because there is no variation in temperature or water flowing over / through them to break the sharp edges.