Method and an apparatus for the simultaneous determination of surface topometry and biometry of the eye
OwnerJean Benedikt, Thomas K. Bende +1inventors
InventorsJean Benedikt, Thomas K. Bende, Adolf F. Fercher
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Abstract
An apparatus (10, 10′) for detecting the surface topography of a cornea (24) of an eye (22) by dynamic or static projection of a pattern onto the surface of the cornea and detection of the pattern reflected by the cornea, providing preferably simultaneous detection of at least one optical property of a layer disposed beneath the cornea.
Claims40
An apparatus for detecting the surface topography of a cornea of an eye, comprising:
- (a) a first light source for dynamically or statically projecting a light pattern onto a first surface area of the cornea;
- (b) a first detector for detecting the light pattern as reflected by the first surface area of said cornea;
- (c) a second light source for illuminating a component of said eye disposed beneath said cornea through a second surface area of the cornea with a second light;
- and
- (d) a second detector for detecting the second light as reflected back from said component of said eye beneath said cornea,
- wherein said second surface area comprises a central portion of the cornea surface, and
- wherein said first surface area surrounds said central portion of said cornea surface.
An apparatus for detecting the surface topography of a cornea of an eye, comprising:
- (a) a first means for dynamically or statically projecting a light pattern onto a first surface area of the cornea, and
- (b) a second means for detecting the light pattern as reflected by said first surface area of the cornea;
- (c) a third means for determining at least one optical property of a component of the eye disposed beneath the cornea, based on reference measurement of an impinging light that is directed into the eye.
A method for detecting the surface topography of a cornea of the eye, comprising the steps of:
- (a) dynamically and statically projecting a light pattern onto a first surface area of the cornea;
- (b) detecting the light pattern as reflected by said first surface area of the cornea;
- (c) illuminating a component of said eye disposed beneath said cornea through a second surface area of the cornea with an impinging light;
- and
- (d) detecting the impinging light as reflected back from said component of the eye beneath the cornea,
- wherein the second surface area comprises a central portion of the cornea surface, and
- wherein the first surface area surrounds said central portion of the cornea surface.
A method for detecting the surface topography of a cornea of an eye, comprising the steps of:
- (a) dynamically or statically projecting a light pattern onto a first surface area of the cornea;
- (b) detecting the pattern reflected by said first surface area of the cornea;
- (c) providing an impinging light;
- (d) measuring said impinging light before its entry into the eye;
- (e) directing said impinging light to illuminate said component of the eye beneath the cornea through a second surface area of the cornea;
- (f) measuring the impinging light as reflected by said component of the eye beneath the cornea;
- and
- (g) determining at least one optical property of said component beneath the cornea, based on measurements of the impinging light.
An apparatus for detecting the surface topography of a cornea of an eye, comprising:
- (a) a first light source for dynamically or statically projecting a first light of a known pattern onto a first surface area of the cornea;
- (b) a second light source for illuminating a component of said eye disposed beneath said cornea through a second surface area of the cornea with a second light;
- and
- (c) at least one detector for detecting the first light and the second light as reflected back by the eye,
- wherein said second surface area comprises a central portion of the cornea surface, and
- wherein said first surface area surrounds said central portion of said cornea surface.
Dependencies are inferred from the claim text.