These files have copyright permissions for download, and they are typically the version that was accepted for publication in an unusual format, rather than the final published versions (which are easier to read, with small editing changes).
There is a temporary link until mid-May 2019 to a free download by anyone of the new JCRS paper "EFFECT OF A SULCUS-FIXATED PIGGYBACK IOL ON NEGATIVE DYSPHOTOPSIA: A RAY-TRACE ANALYSIS" using the following Share Link:
https://authors.elsevier.com/c/1Ypmg39XtpwnUG