ROBERT CHARLES SMITH
Medical Practice in Pittsburgh, PA

6024449, Feb 15, 2000

Jul 13, 1998

9/113028

Robert F. Smith - Pittsburgh PA

A61B 310

351212

Forming an image on a CCD of a grid pattern projected on a target surface and detecting the positional coordinates of the image by correlating voltage peaks in the CCD output voltage during pixel readout synchronized with the count of pulses from a master clock. Topography is calculated by knowing the equations of the rays comprising the projection pattern and the rays from the determined CCD positional coordinates and solving for the 3D coordinates formed by the intersections of the two sets of rays. Means are provided for: blocking the specular component of reflected light from the target surface while passing the diffuse component; forming the rays of the projected grid pattern so that fluctuations in the target surface position do not cause measurement error; adequate focussing of the full grid pattern on the CCD; differentiating the CCD output voltage and detecting a zero crossing for precise timing of count capture at the instant of a peak. In a preferred embodiment, the target surface is a cornea undergoing PRK and a laser projection source pulsed at a high enough rate to provide real time differential topographical display and feedback to the photoablation means. Alternate embodiments include: using the uv photoablating laser as also the projection source in conjunction with a uv sensitive CCD; an adjunct CCD type sensor in the 8 micron region for monitoring corneal sector temperatures during PRK concurrent with the topography measurement.

7058663, Jun 6, 2006

Mar 13, 2001

09/804034

James A. Johnston - Bellevue PA, US
Robert P. Smith - Pittsburgh PA, US

Koninklijke Philips Electronics, N.V. - Eindhoven

G06F 17/30, G06F 7/00, G06F 12/00

707200, 707 10, 707201, 707204

A process of accessing data in a database, inputting the accessed data to a form, using the form with the accessed data by a first user, monitoring the database to detect changes to the accessed data by a second user while the form is being used by the first user, updating the accessed data in the form while being used by the first user in accordance with rules corresponding to the detected changes, and displaying update status of the accessed data in accordance with the updating. The update status can indicate if the accessed data has not been changed since the first user began using the accessed data; if the first user has changed the accessed data; and if the second user has changed the accessed data while the first user is using the accessed data. The process can be implemented in a standalone processing device or in a network.

5350374, Sep 27, 1994

Mar 18, 1993

8/033329

Robert F. Smith - Pittsburgh PA

A61B 1732

606 5

Real time feedback control during photorefractive keratectomy of individually ablated rasterstereographically imaged corneal areas; totality of these areas sufficient in number to result in a postoperative optically smooth epithelialized cornea. Novel micromechanical laser radiation modulating device means together with high speed digital control using specialized algorithms enabling a feedback control cycle of 0. 2 second.