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By In The Human Eye


Failing eyesight causes a dramatic change in life. The aim of this project is to help people with large central visual field loss to better utilize their remaining vision. Central visual field loss means that the macula is dysfunctional, i.e., the sharp foveal vision is lost. Thus, these persons have to rely on their peripheral vision, which is less distinct due to the lower optical quality and the coarser sampling density of the retina. This project seeks to improve peripheral vision by correcting the off-axis optical errors. In a preliminary study on one subject with large central visual field loss, we have measured a doubling in visual acuity when the eccentric refractive errors were corrected with optics specially designed to improve the image on the peripheral retina. This Licentiate Thesis describes how to assess detailed information of the off-axis optical errors in the human eye, by oblique aberration measurements with a Hartmann-Shack wavefront sensor. We have developed this objective method, since the usual subjective refraction, performed with optotypes, is not suitable fo

Year: 2015
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