Volk® Trans Equator® Indirect contact laser lens with flange, 110°/132° FOV, 0.70x image mag., 1.44x laser spot, ideal for mid peripheral retinal diagnosis and focal/grid laser therapy | Ambler Surgical
Two lenses of power - 15 D and + 5D are in contact with each other. The focal length combination is:
schoolphysics ::Welcome::
Probing mechanical principles of focal contacts in cell– matrix adhesion with a coupled stochastic–elastic modelling framework by Huajian Gao, Jin Qian, - ppt download
The Science Behind Contact Lenses | Arizona RETINA Project