Perhaps you should try some spelling variations:
retinal prostheses » retained prostheses (Expand search), retained prosthesis (Expand search), dental prostheses (Expand search)
decrease decrease » decrease release (Expand search), disease decreases (Expand search), decreases disease (Expand search)
decrease retinal » decreased retinol (Expand search), decrease renal (Expand search), decreases renal (Expand search)
decrease after » increase after (Expand search), disease after (Expand search)
decrease can » decrease in (Expand search), decrease and (Expand search), decrease at (Expand search)
can decrease » and decrease (Expand search), can increase (Expand search), to decrease (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 can decrease retinal prostheses ) OR ( decrease _ decrease decrease after ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease can decrease retinal prostheses ) OR ( decrease _ decrease decrease after ))*.