Method of correcting corneal refraction not aligned with the pupil center
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
N/A
Issued Date -
Apr 25, 2002
app pub date -
Oct 22, 2001
filing date -
Oct 20, 2000
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A method is provided of removing less corneal tissue during refractive surgery, when a visual axis or optical axis of an eye is not aligned with a pupil center. The method determines an initial keratometry surface around the visual axis. A visual system error is determined and the visual system error is applied to the initial keratometry surface to determine a target keratometry surface. The initial and target keratometry surfaces are offset by an amount substantially equal to an offset of the visual axis from the pupil center. The target keratometry surface is subtracted from the initial keratometry surface to establish values along a chosen corneal treatment zone diameter. All the values along the chosen corneal treatment zone diameter and within it are set to be positive, thereby defining a resulting ablation profile. The resulting ablation profile is used as a guide for corneal tissue to remove, with greater positive values defining deeper ablation depths.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully