Design and fabrication of accommodating fluidic intraocular lens Free onlinesex video chat through web cam
Here, we demonstrate design and fabrication of a portable automatic phoropter with no need for patient’s feedback.
The system is based on three tunable-focus fluidic lenses and thin-film holographic optical elements to perform automatic refractive error measurement and provide a diagnostic prescription without supervision.
A group of researchers from the University of Arizona's College of Optical Sciences and its Department of Ophthalmology and Vision Science (both in Tucson, AZ) has demonstrated a new type of phoropter that is based on fluidically controlled lenses.
The device is not only much smaller and simpler than a standard phoropter but can be easily computer-controlled, potentially shortening the examination process (see figure).
This visual acuity examination is time consuming and requires constant and reliable feedback from the patient, who needs to mentally compare the two images that are created by placing different dioptric power lenses in front his/her eyes.
This can cause confusion and often leads to inaccuracy of the prescribed power of the glasses.
At the same time, adaptive optics and wavefront detectors for human eye aberration measurement and correction have been studied.Intraocular lenses include a lens body sized and adapted for placement in a mammalian eye and having a plurality of different optical powers, and a movement assembly joined to the lens body and adapted to cooperate with the mammalian eye to effect accommodating movement of the lens body in the eye.The lens body has an azonal, aspheric surface, with the correction power of the lens varying continuously and progressively from the optical axis to the periphery of the lens.One main advantage of HOEs is their ability to work in specific wavelength while being transparent to other wavelengths, which enables them to project the pupil onto the wavefront detector without blocking the patient’s view.This would enable subjective verification of the prescribed data using fluidic lenses.