��. If EC.ECCAT variable is not available then include all records,
assuming drug administration is collected for study eye only.
2.&gt; Subset Subject Characteristics dataset (SC) for only Study Eye Selection
3.&gt; Compare Exposure dataset laterality (EC.ECLAT) with Subject Characteristics dataset laterality
(SC.SCORRES - OS = LEFT, OD = RIGHT) and report if there is any mismatch.</p>
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    <pre class="usage"><span class='fu'>check_ec_sc_lat</span><span class='op'>(</span><span class='va'>EC</sp