The ciliary body zone is considered as a dead zone for the conventional B-scan ultrasound. The entire ciliary body can be clearly defined by ultrasound biomicroscopy from the ciliary processes to the pars plana. UBM provides a valuable data in examination of ciliary body related disorders; for example, in study of ciliary body tumors,ciliary body changes in different types of glaucoma, involvement of the ciliary body in ocular trauma, relationship between the ciliary body and intra ocular lenses and uveitis. UBM provides a promising non-invasive technique that will disclose some of the secrets of the ciliary body.