Manufacture and analysis of a refractive surface with variable asphericity to model the human cornea

摘要

The cornea contributes substantially to the performance of the human eye and obtaining the shape of the anterior corneal surface is crucial for ophthalmic applications such as the manufacture of contact lenses and visual laser correction. In this direction, there exist a large amount of theoretical models which describe the shape of the anterior corneal surface. A model of the anterior corneal surface using high-order aspherics has been previously reported in the literature, and one of the main features of this model is that it has been shown to accurate reproduce the clinical data. In this work we have designed a refractive surface with variable asphericity adopting the model mentioned above by means of finite-element software, and once the design was obtained we proceeded to manufacture the optical surface made of a polymer known as PDMS. Also, an interferometric analysis with a Mach-Zehnder interferometer was performed in order to obtain its wavefront aberration function. The main application of this optical surface is to be used as a substitute of a corneal surface within an optomechanical system to mimic the performance of the human eye.