Abstract: Within a media center extension device, a first media signal is received from a media source and encoded into a first media stream, which is sent via a network to a personal computer media center. Within the personal computer media center, the first media stream is stored within a storage device, such as a hard disk drive. Also within the personal computer media center, a second media stream is retrieved from the storage device, which is sent via the network to the media center extension device. Within the media center extension device, the second media stream is decoded into a second media signal, which is rendered for display on a display device.

Abstract: A home entertainment system includes a home media center for providing media content to a plurality of remotely located televisions within a home. The home media center includes a user interface module to generate graphical commands usable by a separate media center extension to render a focused navigation user interface on one of the plurality of televisions.

Abstract: A personal computer media center is connected to a media center extension and a personal video recorder (PVR) through a home network. The personal computer media center instructs the PVR through the home network to record a television broadcast. Subsequently, the personal computer media center instructs the PVR through the home network to output a media signal of the recorded television broadcast to the media center extension, which displays the media signal on a television.

Abstract: A home entertainment system includes a home media center for providing media content to a plurality of remotely located televisions within a home. The home media center includes a user interface module to generate graphical commands usable by a separate media center extension to render a focused navigation user interface on one of the plurality of televisions.

Abstract: Within a personal computer media center, a user interface module generates graphical commands representing a user interface. A network interface then sends the graphical commands via a home network to a media center extension, where a display interface renders the graphical commands into the user interface on a television. In one configuration, the user interface includes a focus area intersected by a first axis, as well as a first sequence of cards displayed along the first axis, each card graphically representing an available option, one card being displayable within the focus area. The first sequence of cards is to be scrolled along the first axis in response to an initiating action to progressively change the card within the focus area. Furthermore, the scrolling of cards is to be halted in response to a terminating action to show a selected card from the first sequence within the focus area.

Abstract: A customized corneal profile is provided by combining corneal topography data with captured wavefront aberration data to form a course of refractive treatment of the eye. In one embodiment, the captured wavefront data is employed within the area of a pupil, while the corneal topography data is employed in the area outside of the pupil. In other embodiments, the topography data is adjusted based on the wavefront data, a course of refractive treatment is simulated and displayed upon the topography data, and an initial evaluation of the suitability of a patient for treatment is performed based on the topography data.

Abstract: A line indicating the current time is displayed across at least a portion of an electronic program guide (EPG). The line is perpendicular to the time axis of the EPG and bisects at least one program element of the EPG into an elapsed portion and a remaining portion, each being proportional in size to the time periods represented thereby. The ratio of the elapsed time to the running time of the program is an indication of the completion status of the program. In certain implementations, the line bisects a plurality of elements of the EPG, allowing the user to immediately determine the completion status of a plurality of programs.

Abstract: An intraocular lens derivation system 10 includes an eye surface measurement device 12 for measuring the shape and position of at least the anterior and a posterior corneal surfaces of the eye, a length measurement device 14 for measuring at least the axial length of the eye, and an IOL calculator 24, connected to devices 12 and 14, for accurately selecting the proper IOL using at least in the selection the measured anterior and posterior corneal surface information and the axial length of the eye.

Abstract: An intraocular lens derivation system 10 includes an eye surface measurement device 12 for measuring the shape and position of at least the anterior and a posterior corneal surfaces of the eye, a length measurement device 14 for measuring at least the axial length of the eye, and an IOL calculator 24, connected to devices 12 and 14, for accurately selecting the proper IOL using at least in the selection the measured anterior and posterior corneal surface information and the axial length of the eye.

Abstract: A system for providing two-way communication using an interactive television system includes a remote control and a set top box. The remote control is configured to control operation of the interactive television system. In addition, the set top box is configured to establish two-way communication with a far-end user via the interactive television system. In one configuration, the set top box includes a noise cancellation module for canceling estimated TV sound from an audio signal captured by the remote control. In another configuration, the set top box includes an output suppression module for suppressing TV sound while an audio signal is being captured.

Abstract: A line indicating the current time is displayed across at least a portion of an electronic program guide (EPG). The line is perpendicular to the time axis of the EPG and bisects at least one program element of the EPG into an elapsed portion and a remaining portion, each being proportional in size to the time periods represented thereby. The ratio of the elapsed time to the running time of the program is an indication of the completion status of the program. In certain implementations, the line bisects a plurality of elements of the EPG, allowing the user to immediately determine the completion status of a plurality of programs.

Abstract: An eye evaluation system includes an eye evaluating device (12) that acquires at least two exams of a patient's eye. The exams are a measure of some aspect of a patient's vision. An algorithm (FIG. 2) then compares the exams to determine if the exams are acceptable.

Abstract: In an inventive method for mapping the topography of an eye, elevation measurements of the eye are collected using a slit beam diffuse reflection system, such as an ORBSCAN™ device. An approximating b-spline surface is then fitted to the elevation measurements. Slope measurements of the eye are collected using a Placido-based reflective system, but the slope measurements are referenced to points on the b-spline surface, rather than to points approximated using the conventional constant curvature method, so the measurements have substantially improved accuracy. The elevation and slope measurements are then blended using weighted least squares fitting techniques. A new b-spline surface is fitted to the blended measurements, with the new surface having substantially improved accuracy in depicting the actual topography of the eye as a result of the elevation-improved accuracy of the slope measurements.

Abstract: An eye measurement system (10) includes a biometric ruler (14) and an anterior segment analyzer (12) where the system (10) compares a biometric ruler measurement to an anterior segment analyzer measurement to correct for any error in the biometric ruler measurement.

Abstract: In an inventive method for mapping the topography of an eye, elevation measurements of the eye are collected using a slit beam diffuse reflection system, such as an ORBSCAN.TM. device. An approximating b-spline surface is then fitted to the elevation measurements. Slope measurements of the eye are collected using a Placido-based reflective system, but the slope measurements are referenced to points on the b-spline surface, rather than to points approximated using the conventional constant curvature method, so the measurements have substantially improved accuracy. The elevation and slope measurements are then blended using weighted least squares fitting techniques. A new b-spline surface is fitted to the blended measurements, with the new surface having substantially improved accuracy in depicting the actual topography of the eye as a result of the elevation-improved accuracy of the slope measurements.

Abstract: In an inventive method for mapping the topography of an eye, elevation measurements of the eye are collected using a slit beam diffuse reflection system, such as an ORBSCAN.TM. device. An approximating b-spline surface is then fitted to the elevation measurements. Slope measurements of the eye are collected using a Placido-based reflective system, but the slope measurements are referenced to points on the b-spline surface, rather than to points approximated using the conventional constant curvature method, so the measurements have substantially improved accuracy. The elevation and slope measurements are then blended using weighted least squares fitting techniques. A new b-spline surface is fitted to the blended measurements, with the new surface having substantially improved accuracy in depicting the actual topography of the eye as a result of the elevation-improved accuracy of the slope measurements.

Abstract: An apparatus for analyzing a subject's cornea includes a frame having first and second ends, a single curvature (i.e. non-planar and non-axisymmetrical) screen associated with the first end of the frame, the non-planar and non-axisymmetrical screen having an opaque covering which is interrupted along its surface to form a pattern. A light source is disposed to cast the pattern placed on the screen onto the subject's cornea, thus causing a pattern to reflect therefrom. A light detector (e.g. a camera, CCD, or human eye) is disposed to sense the pattern reflected from the subject's cornea. The improved Placido plate is easier to manufacture. The design allows for incorporation of extremely complex pattern shapes, while its shape helps to maintain focus of the image.