Abstract: A comfortable finger mounted optical device requiring an optical device, at least one bonding holder, strap, or elastic band sized to receive any finger(s) or thumb, and a base plate or case. The comfortable finger mounted optical device can have many different variations including, but not limited to, the incorporation of split rings, straps, elastic bands, sleeves, Fresnel lens, or pivotal or slidable lens assemblies. In addition, the comfortable finger mounted optical device can have various attachments including, but not limited to, advertisements, an elastic cover, or LED's. This device is useable, convenient, as well as comfortable and snug-fitting.

Abstract: In a universal, adjustable spacer assembly, first and second opposed wedges have faces that are inclined with respect to a longitudinal axis. As the wedges translate along the longitudinal axis with respect to one another, vertical distance between an upper face and a lower face of the first and second wedges respectively changes. Longitudinally displaced portions of a rotatable member such as a threaded rod are received in a first and a second collar member pivotally mounted with respect to the first and second wedges respectively. As the rod rotates, longitudinal distance between the collar members changes, and the wedges slide against each other, the collar members rotate within each wedge. In a further form, opposing track members may be fixed to inclined surfaces of the first and second wedges respectively.