37 results about "Retinal structure" patented technology

A system, method and apparatus for anatomical mapping utilizing optical coherence tomography. In the present invention, 3-dimensional fundus intensity imagery can be acquired from a scanning of light back-reflected from an eye. The scanning can include spectral domain scanning, as an example. A fundus intensity image can be acquired in real-time. The 3-dimensional data set can be reduced to generate an anatomical mapping, such as an edema mapping and a thickness mapping. Optionally, a partial fundus intensity image can be produced from the scanning of the eye to generate an en face view of the retinal structure of the eye without first requiring a full segmentation of the 3-D data set. Advantageously, the system, method and apparatus of the present invention can provide quantitative three-dimensional information about the spatial location and extent of macular edema and other pathologies. This three-dimensional information can be used to determine the need for treatment, monitor the effectiveness of treatment and identify the return of fluid that may signal the need for re-treatment.

The invention relates to a high-resolution retinal imaging method and device notably comprising an emission source (LSr) for emitting a light beam for the illumination of the retina of an eye (10) of a subject, a detection device (12) capable of detecting spatial-frequency structures of 250 cycles / mm measured in the plane of the retina, an optical imaging system (16) allowing for the formation of an image of at least a part of the retina on the detection device (12), a device (15) for measuring optical defects with an analysis plane of the optical defects, a correction device (14) comprising a correction plane and intended to correct, in said correction plane, the light rays from said emission source (LSr) and backscattered by the retina as a function of the optical defects measured by the measurement device (15). The correction and analysis planes are optically conjugated with a predetermined plane (17) of the eye, and the input pupil of said optical imaging system has a diameter of between a first value Φmin and a second value Φmax, the first value being defined to allow for the detection by said detection device (12), at an imaging wavelength, of structures of the retina exhibiting a spatial frequency of 250 cycles per millimeter, and the second value being less than 5.75 mm.

The invention discloses a biologic sclera contraction band and a preparing method thereof. The biologic sclera contraction band is in a band as a whole; the cross section of the biologic sclera contraction band is arc-shaped; the biologic sclera contraction band is thickest in the middle and gradually becomes narrower from the middle to the two sides through arc-shaped transition; the whole length of the biologic sclera contraction band is 3-40mm; the middle thickness of the biologic sclera contraction band is 1-3mm; the thickness of the two sides of the biologic sclera contraction band is 0.5-2mm; the band width of the biologic sclera contraction band is 3-8mm. The biologic sclera contraction band can be applied to combination with a biologic posterior sclera reinforcing band, can contract sclera and limit the expansion of the sclera, is used for treating high myopia macular retinal detachment, full retinal detachment and other certain non-incremental retinal detachments and better keeps and protects retinal structures and functions. The base material of the biologic sclera contraction band is taken from the trachea, ligament, trunk vessel or cartilage of an animal, the strength is increased through genipin cross-linking solidifying treatment, the elasticity and the hardness are proper, and the biologic sclera contraction band cannot be easily absorbed, has great tissue compatibility, causes few complications and overcomes the defects of the conventional retinal detachment intra and extra surgeries.

According to one or more embodiments, systems and methods that combine structural examination capabilities of one device with functional examination capabilities of another device to perform a separate or combined structural and functional evaluation of visual functions of the patient's eyes are described herein. A system for combined structural and functional evaluation of a retina may include a structural evaluation unit which may be an OCT, PS-OCT, SLO or PS-SLO and a functional evaluation unit which may be a perimeter, microperimeter, or any other type of visual field analyzer. The structural evaluation unit and the functional evaluation unit may be located within a same housing, and thus may be utilized as a single device. The structural evaluation unit may record structural measurements associated with the patient's eye or retina and the functional evaluation unit may record functional measurements associated with the patient's field of view.

Methods and systems are presented to analyze a retinal image of an eye and assigns features to known anatomical structures such as retinal layers. One example method includes receiving interferometric image data of an eye. A set of features is identified in the image data. A first subset of identified features is associated with known retinal structures using prior knowledge. A first set of characteristic metrics is determined of the first subset of features. A second set of characteristic metrics is determined of a second subset of features. Using the characteristic metrics of the first and the second sets, the second subset of features is associated with the retinal structures. Another example method includes dividing interferometric image data into patches. The image data in each patch is segmented to identify one or more layer boundaries. The segmentation results from each patch are stitched together into a single segmentation dataset.

A device for determining biometric variables of the eye, as are incorporated in the calculation of intraocular lenses including a multi-point keratometer and an OCT arrangement. The keratometer measurement points are illuminated telecentrically and detected telecentrically and the OCT arrangement is designed as a laterally scanning swept-source system with a detection region detecting the whole eye over the whole axial length thereof. The multi-point keratometer ensures that a sufficient number of keratometer points are available for measuring the corneal surface. By contrast, telecentricity ensures that the positioning inadequacies of the measuring instrument in relation to the eye to be measured do not lead to a local mismatch of the reflection points. The swept-source OCT scan detects the whole eye over the length thereof so that both anterior chamber structures and retina structures can be detected and a consistent whole eye image can be realized.

Methods and apparatus for imaging multiple retinal structures and montaging of multiple retinal images are provided. The method involves cross-correlating images from different imaging channels to compensate for intra-frame distortion due to retinal movement during image acquisition, and conducting a second cross-correlation to filter out any motion artifacts in the images. The resultant images are combined to generate a composite image. The method also involves controlling light directed on the retina spatially and temporally.

The present invention refers to the field of ophthalmology, and in particular to that of devices and methods for supporting the diagnosis of important eye pathologies such as Age-related Macular Degeneration (AMD), Diabetic Retinopathy (DR), anomalies and dysfunctions of the retina and of sight in general such as degeneration of the retinal structure of the optical nerve and of the visual cortex. More specifically, the invention concerns a new device and method for recording the electroretinogram (so-called ERG) of an eye, i.e. the bioelectric response of the retina induced by a light stimulus, through the eyelid.