扶又作浮。五根之外形眼可見者。是為扶助正根之五塵，故謂之扶塵根。又此塵根為浮虛之法，故謂之浮。此扶塵根為所依，別有淨色之眼耳根等，此謂之正根或勝義根。有發識取境之實用也。
The external organs, i.e. of sight, etc., which aid the senses; 扶塵根 is also written 浮塵根 meaning fleeting, vacuous, these external things having an illusory existence; the real organs, or indriya, are the 正根 or 勝義根 which evolve the ideas.
一扶塵根 指眼球、外耳等肉團所形成之五根外形器官，係扶助正根之五塵，其自身並無發識取境之作用，故稱為扶塵根。又作扶根、浮根、扶根塵。五根具有扶根與正根，正根（又作勝義根）非生理機能，而是五根據以發生感覺認識作用之實體，乃依於扶根而立，取外界之境，發內界之識，其體清淨微妙，為集合極微之四大而成，非肉眼可見，即指五官之神經。〔俱舍論卷二、成唯識論述記卷二〕（參閱「勝義根」6136）p3709