Perhaps you should try some spelling variations:
increase refractive » increases reactive (Expand search), increased reactive (Expand search), increase reproductive (Expand search)
decrease processes » disease processes (Expand search), defense processes (Expand search), decay processes (Expand search)
decrease decrease » decrease release (Expand search), decreases disease (Expand search), disease decreases (Expand search)
refractive error » refractive errors (Expand search)
decrease can » decrease in (Expand search), decrease and (Expand search), decrease at (Expand search)
can increase » an increase (Expand search), and increase (Expand search), an increased (Expand search)
decrease to » decreased to (Expand search), decrease toc (Expand search), decrease the (Expand search)

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease to decrease decrease processes ) OR ( decrease can increase refractive error ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease to decrease decrease processes ) OR ( decrease can increase refractive error ))*.