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US 7,744,217 B2Granted
Apparatus and method for determining an eyeglass prescription for a vision defect of an eye
AssigneeCarl Zeiss Vision GmbH
InventorsJesus Miguel Guillen Cabeza, Timo Kratzer
Life of this patent
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Abstract
The disclosure relates to a method for determining an eyeglass prescription for a vision defect of an eye. In certain embodiments, the method includes optimizing a caustic in the area of the retina of the eye for a light ray passing through the eyeglass prescription and the eye. The disclosure further relates to an apparatus that is suitable for carrying out the method.
Claims37
A method for determining an eyeglass prescription for a vision defect of an eye, the method comprising:
- mathematically varying a preliminary prescription within a target space to determine the eyeglass prescription,
- wherein mathematically varying the preliminary prescription comprises using an electronic processor to calculate, for each of multiple sets of parameter values, a value of a metric related to a caustic of a light ray passing through a corrective optic and the eye, each set of parameter values corresponding to a different prescription of a corrective optic, and
- the eyeglass prescription is selected as the prescription for which the caustic meets predetermined requirements in an area of the retina of the eye.
An apparatus comprising:
- an analyzer device comprising an electronic processor configured, during operation, to determine an eyeglass prescription for a vision defect of an eye by mathematically varying a preliminary prescription within a target space,
- wherein mathematically varying the preliminary prescription comprises using the electronic processor to calculate, for each of multiple sets of parameter values, a value of a metric related to a caustic of a light ray passing through a corrective optic and the eye, each set of parameter values corresponding to a different prescription of a corrective optic, and
- the eyeglass prescription is selected as the prescription for which the caustic meets predetermined requirements in an area of the retina of the eye.
Dependencies are inferred from the claim text.