public function getLetterIOPReadingLeft($patient)
{
if ($episode = $patient->getEpisodeForCurrentSubspecialty()) {
if ($iop = $this->getElementForLatestEventInEpisode($episode, 'models\\Element_OphCiExamination_IntraocularPressure')) {
return $iop->getLetter_reading('left');
}
}
}