Apparatus and method for measuring aberrations of the optical system of a living being
AssigneeCostruzioni Strumenti Oftalmici C.S.O. S.R.L.
InventorsFrancesco VERSACI, Franco GIANNOZZI, Gabriele VESTRI, Silvano PIERI
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Abstract
The present invention refers in general to the measurement of aberrations of the optical system of a living being, in particular a human. More specifically, the invention refers to methods and systems for reconstructing a wave front and/or for building a refractive error map.
Claims12
An analysis apparatus for measuring the aberrations of an optics ocular system of a patient, the optical system comprising a retina, the analysis apparatus comprising:
- a projection device (A) adapted to project a point or a pattern of light radiation on the retina of the patient;
- an observation device (B) comprising image sensor means having a focal plane which is not conjugated with the retina, adapted to receive the light radiation reflected by the retina;
- processing means adapted to process a signal obtained from said sensor means to obtain, via a determined algorithm, a wave front and/or the refractive state generated by the optical system;
- the apparatus further comprising measuring means adapted to measure the dispersion of the light radiation on the retina and/or from the retina, due to scattering or aberration blurs, said processing means being configured so as to use said measure of the dispersion as a correction factor in said algorithm.
An analysis method for measuring the aberrations of an optics ocular system of a patient, the optical system comprising a retina, the method comprising:
- projecting a point or a pattern of light radiation on the retina of the patient;
- observing the light radiation reflected by the retina focusing on a focal plane which is not conjugated with the retina;
- obtaining from said observation, via a determined algorithm, a wave front and/or the refractive state generated by the optical system;
- the method further providing:
- measuring the dispersion of the light radiation on the retina and/or from the retina, due to scattering or aberration blurs;
- and using said measure of the dispersion as a correction factor in said algorithm.
Dependencies are inferred from the claim text.