passages.id: split_6_test_2059_passage
passages.type: progene_text
passages.text: For 146 eyes the following were obtained : (i) contrast matches to two suprathreshold FD stimuli ( normal subjects , ocular hypertensve suspects , primary open angle glaucoma subjects ) ; (ii) two alternative forced choice ( 2AFC ) thresholds for horizontally versus vertically orientated FD gratings : and (iii) contrast thresholds determined by method of adjustment ( MOA ) for five different stimulus types .