Perhaps you should try some spelling variations:
decreasing vision » decreasing in (Expand search), decreasing pain (Expand search), decreasing risk (Expand search)
vision processing » visual processing (Expand search), ration processing (Expand search), design processing (Expand search)
decrease rapidly » disease rapidly (Expand search), decrease lipid (Expand search)
rapidly decrease » rapid decrease (Expand search), rapid increase (Expand search), taping decrease (Expand search)
not decreasing » non decreasing (Expand search), of decreasing (Expand search), on decreasing (Expand search)
decrease human » increase human (Expand search), disease human (Expand search), decrease asian (Expand search)
human decrease » human deceased (Expand search), human increase (Expand search), human disease (Expand search)
decrease not » decrease of (Expand search), decrease akt (Expand search), decrease at (Expand search)

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (( decrease NOT decreasing vision processing ) OR ( decrease human decrease rapidly decrease ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease not decreasing vision processing ) OR ( decrease human decrease rapidly decrease ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease not decreasing vision processing ) OR ( decrease human decrease rapidly decrease ))*.