In the alto and bass clefs it would be possible to do this , but because in piano music ( which uses the treble and bass clefs ) this would result in a dissimilarity between the two staves that might throw off sight-reading , this is not usually done .
In the bass clef it would be possible to do this without a ledger line , but because sight reading is easier when both staves look the same , it is not usually done in piano music .