Abstract
Varifocal lenses are a lens with different focal lengths and, therefore, magnification. These are used extensively in the optics industry as progressive lenses in eyewear. A focal length gradient exists along the lens height, so objects magnify as the user looks downwards. Unfortunately, progressive lenses are rigid materials making them closer to quasi-varifocal lenses. In this present study, varifocal lenses can change focal length to a constant value. This study investigates polyvinyl chloride (PVC) gel and Electrohydraulic Actuators Powered by Induced Interfacial Charges (EPIC) actuators as varifocal lenses. Polyvinyl chloride (PVC) gels are a new type of dielectric elastomer actuator only investigated at the start of the century. The transparent gels are known for producing displacement under an effective voltage in a mechanism known as anodophilic creep, the axisymmetric tendency to deform towards the anode surface. The EPIC actuator is a novel application of PVC gels that places
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