protected function addIop(\FlotChart $chart, models\Element_OphCiExamination_IntraocularPressure $iop, $timestamp, $side) { if ($reading = $iop->getReading($side)) { $seriesName = strtoupper($side[0]) . 'E'; $chart->addPoint($seriesName, $timestamp, $reading, "{$reading} mmHg"); } }