The eye spots that are present at the tip of the tentacles or instead at the base of the tentacles range from simple ocelli that can not project an image -LRB- simply distinguishing light and dark -RRB- , to more complex pit and even lens eyes .

The eyes that may be present at the tip of the tentacles range from simple ocelli that can not project an image -LRB- simply distinguishing light and dark -RRB- , to more complex pit and even lens eyes .
