Abstract: A method and apparatus for imaging the choroid is described. A plurality of choroidal images is captured. The plurality of images is aggregated to generate a single aggregated image with good contrast. Prior to any aggregation, the images may be aligned to remove any displacement caused by saccadic motion between one frame and another, and any images degraded by a blink of the patient can be identified and discarded.

Abstract: A method and apparatus for imaging the choroid is described. A plurality of choroidal images is captured. The plurality of images is aggregated to generate a single aggregated image with good contrast. Prior to any aggregation, the images may be aligned to remove any displacement caused by saccadic motion between one frame and another, and any images degraded by a blink of the patient can be identified and discarded.

Abstract: A method and apparatus for imaging the choroid. The method comprises indirectly illuminating the choroid of an eye using incident light having a wavelength spectrum in the near-infrared region; and collecting the light passing out through the choroid and the pupil of the eye using an image sensor to obtain an image of the choroid.

Abstract: A method and apparatus for quantitative imaging of the retinal fundus. The method for retinal health assessment comprises imaging the retinal fundus of a patient's eye at different wavelengths within a spectral range and determining spectral reflectivity of the retina for each pixel within a field of view (FOV). The retinal health is assessed based on the spectral reflectivity of the retina. The metabolic and anatomical activity of the eye is monitored to detect, at the earliest stage, activity that could lead to the onset of blinding eye diseases such as macular degeneration, diabetic retinopathy, glaucoma, cataracts, etc.

Abstract: A method and apparatus for quantitative imaging of the retinal fundus. The method for retinal health assessment comprises imaging the retinal fundus of a patient's eye at different wavelengths within a spectral range and determining spectral reflectivity of the retina for each pixel within a field of view (FOV). The retinal health is assessed based on the spectral reflectivity of the retina. The metabolic and anatomical activity of the eye is monitored to detect, at the earliest stage, activity that could lead to the onset of blinding eye diseases such as macular degeneration, diabetic retinopathy, glaucoma, cataracts, etc.

Abstract: A method and apparatus for quantitatively imaging the retinal fundus. The method for retinal health assessment comprises imaging the retinal fundus of a patient's eye at different wavelengths within a spectral range and determining spectral reflectivity of the retina for each pixel within a field of view (FOV). The retinal health is assessed based on the spectral reflectivity of the retina. The metabolic and anatomical activity of the eye is monitored to detect, at the earliest stage, activity that could lead to the onset of blinding eye diseases such as macular degeneration, diabetic retinopathy, glaucoma, cataracts, etc.

Abstract: A method and apparatus for imaging the choroid. The method comprises indirectly illuminating the choroid of an eye using incident light having a wavelength spectrum in the near-infrared region; and collecting the light passing out through the choroid and the pupil of the eye using an image sensor to obtain an image of the choroid.

Abstract: A method and apparatus for quantitatively imaging the retinal fundus. The method for retinal health assessment comprises imaging the retinal fundus of a patient's eye at different wavelengths within a spectral range and determining spectral reflectivity of the retina for each pixel within a field of view (FOV). The retinal health is assessed based on the spectral reflectivity of the retina. The metabolic and anatomical activity of the eye is monitored to detect, at the earliest stage, activity that could lead to the onset of blinding eye diseases such as macular degeneration, diabetic retinopathy, glaucoma, cataracts, etc.

Abstract: A hand-held colorimetric device (101) suitable for use by blind or color-blind individuals to determine the color of a surface-under-test (SUT), for example of a fabric, has an aperture (110) which, in use, is covered by the SUT (113) whose color is to be determined. Six LEDs (115A, 115B, 116B, 117A and 117B) arranged in pairs (115A/115B, 116A/116 B, 117a/117B) emitting red/orange, green, and blue light illuminate the SUT and diffuse reflections therefrom containing red/orange, green, and blue spectrum sample values are used to determine the luminous reflectivity and chromaticity values for the color of the SUT. The measured values are compared with colorimetric values of reference surfaces to determine the color of the SUT. The colorimetric device may output the name of the color aurally.

Abstract: In an eye-directed communications device which displays characters, for example symbols or letters, and determines a user's selection by monitoring eye position to determine which of the characters is being observed, difficulties in providing for selection of the usual characters and functions of a conventional 101 key computer keyboard are overcome by dividing the required characters/functions into three sets, designated as lower case, upper case and "command" case. In order to select a particular character, the user first selects the case and then selects the character. Only one set need be displayed to the user, the characters in the other sets having spatial correspondence with those in displayed set. The system may also, or alternatively, display the characters in groups and define position selection fields corresponding to the positions of the characters in each group.