159 results about "Fundus (eye)" 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.

An ophthalmic photographing apparatus includes: an interference optical system including a splitter that splits light, emitted from a measurement light source, into measurement light and reference light, and synthesizing the measurement light reflected on an eye with the reference light to guide the synthesized light to a detector; a driving part that moves an optical member arranged in the optical path to adjust an optical-path difference between the measurement light and the reference light; an image obtaining part that obtains a tomographic image of a fundus or an anterior segment based on a light receiving signal output from the detector; and a driving control unit that controls driving of the driving part to locate the optical member in a predetermined position corresponding to either a photographing mode for photographing the tomographic image of the fundus or a photographing mode for photographing the tomographic image of the anterior segment.

The invention relates to a measurement system and a method for detecting ocular fundus blood flow velocity with high resolution. The measurement system is characterized in that a bacon light source is focused on the fundus by a human eye through a plurality of optical components to form a bacon spot; the spot is transformed into parallel light through the eye after backward reflection, and reaches a wavefront sensor through a wavefront phase corrector and a series of optical components to realize the process of self adaptive aberration correction; the imaging light source is focused on the front focus of the eye through the optical components, and is collimated by the eye into the parallel light to illuminate the retinal vascular microcirculation system; a laser speckle interferometry is formed on the surfaces of the fundus blood vessels illuminated; the interference field enters into wavefront phase corrector through the optical components and is reflected and finally focused on a photodetector through the series of optical components; a light speckle imaging process is realized. The measurement method has the advantage of enabling the whole system to overcome negative influences from the aberration of human eyes on capturing laser speckle interference field images, thus facilitating to obtain fundus velocity graph of high precision and resolution.

Provided is an ocular optical system, which permits a measuring beam scanned by two scanning units disposed close to each other to enter an anterior ocular segment of an eye to be inspected and to irradiate a fundus. The ocular optical system includes an optical unit which is disposed at a position of an intermediate image, which is optically conjugate to the fundus, and has a surface having different optical powers corresponding to scan directions of the two scanning units.

The invention discloses a multi-functional ophthalmic full-automatic measurement method and system. The multi-functional ophthalmic full-automatic measurement method comprises the steps that a three-dimensional movement control unit is adjusted to automatically adjust a probe assembly after a to-be-measured eye is monitored to be located right in front of an eye objective lens; a control device ina body module drives a first mobile control unit to control an anterior segment OCT insertion mirror to be inserted into an optical path or moved out of the optical path and adjust an optical path adjusting device; measurement light provided by the body module enters the to-be-measured eye and is focused in the anterior segment of the to-be-measured eye or the fundus of the to-be-measured eye soas to return an anterior segment optical signal or a posterior segment optical signal to be transmitted to the body module; and the body module provides reference light and can utilize the reference light to interfere with the anterior segment optical signal or the posterior segment optical signal and collect the anterior segment interference optical signal or the posterior segment interference optical signal obtained through interference so as to respectively collect an anterior segment OCT image or a posterior segment OCT image of the eye to be measured. The measurement convenience can be improved, and the measurement accuracy can be improved.

The invention discloses a fundus blood vessel image segmentation adversarial sample generation method and a segmentation network security evaluation method. The fundus blood vessel image segmentationadversarial sample generation method comprises the steps: 1, establishing a fundus blood vessel image segmentation network; 2, collecting an original fundus blood vessel image, marking blood vessels in the collected image, and constructing a training sample to train a fundus blood vessel image segmentation network; 3, constructing a generative disturbance network to generate an adversarial sampleimage; 4, inputting the generated adversarial sample image into a trained fundus blood vessel image segmentation network to obtain a segmentation result, calculating an objective function, and updating parameters of a generated disturbance network by minimizing the objective function to obtain an optimized generated disturbance network; and 5, generating disturbance by using the optimized disturbance generation network, and adding the disturbance to the original fundus blood vessel image to obtain an adversarial sample image. According to the fundus blood vessel image segmentation adversarialsample generation method, the adversarial sample image which is indistinguishable with the human eyes of the original image can be obtained, and the obtained generative disturbance network can betterlearn the characteristics of the segmentation network.

The invention relates to an anterior-posterior segment frequency domain optical coherence tomography system, in the anterior segment / posterior segment imaging process, an FD-OCT system adopts the sameoptical path hardware, and conversion of a scanning focus range of probe light from the fundus retina to the cornea is achieved by internally adjusting the position of a scanning conversion assemblyspecially designed in a sample arm. In the anterior segment / posterior segment imaging process of the eye, the frequency domain optical coherence tomography imaging system adopts the same optical pathhardware; by internally adjusting the position of the scanning conversion assembly specially designed in the sample arm, conversion of the scanning focus range of the probe light from the fundus retina to the cornea is achieved, and therefore the anterior segment and posterior segment frequency domain optical coherence tomography system can have the anterior segment imaging function without addingthe FD-OCT system hardware. According to the invention, an anterior segment imaging function of the posterior segment frequency domain optical coherence tomography system can be realized without adding an additional imaging objective lens, and the use and detection operation process and the system structure are simplified.

The invention provides a combined air pressure type eyestrain recovery instrument. The combined air pressure type eyestrain recovery instrument comprises two spectacle frames, two lenses, two seal supporting rings, a Y-shaped connecting rubber tube, a hollow rubber ball and a fastening belt. The two spectacle frames are connected together through a cross beam. Air generated when the hollow rubber ball is pinched, pressed and loosened can massage the double eyes in a pulse mode, and the good effects of promoting fundus blood circulation, reliving eyestrain and relaxing the eyes are achieved. It is proved through a large number of use data with eyestrain and different lesions that the symptoms of shortsightedness, presbyopia, astigmatism and cataract are relieved, and especially the obvious relieving effect is achieved for the symptoms of dryness, obscurity, itches, blurred vision and the like caused by eye overuse. Power of the instrument is generated by squeezing the hollow rubber ball by a user with the hand, the whole process is quiet and silent, and the instrument can be used at any time. The instrument is completely made of environment-friendly medical materials, no smell or pollution is caused, and environment friendliness is achieved. The weight and size are similar to those of a pair of normal glasses, and the instrument is convenient to carry.

The invention discloses a mobile terminal screen brightness adjusting system and method. The system comprises a light collection part, a control part and an adjustment part. According to the method and the system, environment brightness actually observed by the eyes of a user is acquired and calculated, and the environment brightness is divided into multiple sections according to the characteristics of the human eyes to perform screen brightness adjustment of different strategies, so that the human eyes are in the environment with the most comfortable brightness ratio, and the light emitted bya mobile terminal screen does not damage the fundus of the eye.

The invention provides a formula for rapidly and effectively treating and preventing ophthalmic diseases, and a preparation method; the formula is a drug composition comprising lutein, taurine, and organic trace elements; the cell oxygen supply effect of organic germanium is especially emphasized, and is the base of quicker clinical curative effect; and the formula has the characteristics of quick results and consolidated efficacy on relieving ophthalmic diseases such as eye fatigue, myopia, fundus damage, etc. The components of the formula comprises: lutein, yeast zinc, yeast selenium, yeast chromium, organic germanium and taurine. In clinical observation of volunteers, the drug composition is proved to have the efficacy of rapidly relieving eye fatigue, rapidly improving blurred vision, eliminating muscae volitantes, and effectively controlling cataract and diabetic retinopathy, and is a drug composition with broad market in the ophthalmology field.