آمريڪا مان iridology جو پيءُ برنارڊ جينسن هڪ مشهور ماهر آهي جنهن iridology جي تحقيق جي ترقي کي هٿي ڏني. هن 300.000 ماڻهن جي تشخيص لاءِ پنهنجي پوزيشن جو طريقو استعمال ڪيو، اهو ڪنهن به ٻئي iridology چارٽ کان وڌيڪ صحيح آهي، ۽ اهو سڄي دنيا ۾ iridology جي عالمن طرفان قبول ڪيو ويو آهي، هن جي iridology چين ۾ سڀ کان وڌيڪ استعمال ٿيل iridology چارٽ آهي.
Bernard Jenson is a nutritionist and he is the pioneer of iridology. He concluded the experience of forefathers and developed the most detailed and complete iridology chart, and it dedicates the relation between areas of iris and organs.
His iridology chart is still the most accurate, and it is widely used in clinical area. The confirmation part by most experts takes 85%, and 10% of it needs more discussion, and 5% of it needs to be filled with.