The uses of Iyengar  yoga props

Props are introduced in a typical class to help practitioners achieve the right poses despite their limitations while at the same time gaining the most benefits from the poses. 

Besides using props as helps, hands-on adjustments are given by the teacher to each person to assist them performing the poses correctly while keeping the right alignments.

Props are also used to modify poses for those who are limited in their abilities to perform asanas. With the right props people with conditions are able to do the yoga and gain the benefits.