public function relations()
{
return array('eye' => array(self::BELONGS_TO, 'Eye', 'eye_id'), 'reading' => array(self::BELONGS_TO, 'OEModule\\OphCiExamination\\models\\OphCiExamination_IntraocularPressure_Reading', 'reading_id'), 'instrument' => array(self::BELONGS_TO, 'OEModule\\OphCiExamination\\models\\OphCiExamination_Instrument', 'instrument_id'), 'qualitative_reading' => array(self::BELONGS_TO, 'OEModule\\OphCiExamination\\models\\OphCiExamination_Qualitative_Scale_Value', 'qualitative_reading_id'));
}