7 results about "Impaired Vision" patented technology

A UV-laser-based system (UVL-LVC system) for correcting the impaired vision of a patient's eye has a UV-laser source, which emits laser radiation to treat the patient's eye, and imaging optics for focusing the laser radiation onto the cornea of the patient's eye. The imaging optics allow a detection of a reflection of radiation, which is emitted onto the cornea of the patient's eye with the imaging optics and is at least partly reflected by the cornea of the patient's eye back into the imaging optics at an acceptance angle χMax of at least 2.5°. Additionally a method for centering a UVL-LVC system is disclosed.

Tactile floor guidance system for persons with impaired vision, comprising an arrangement of guidance elements (100) laid on a floor with a tactilely perceptible surface structure (120), wherein the arrangement extends along a predefinable path to guide persons along this path, and wherein the arrangement of guidance elements (100) includes at least one curved guidance element (300) in addition to straight guidance elements (200).

Provided is a visual field estimation apparatus using a machine learning model that has been machine-trained so that, with respect to a plurality of eyes to be examined, at least one of image information of retina and three-dimensional structure information of retina is acquired at each of a plurality of time points, visual field related information relating to a visual field of the eye to be examined is acquired at a corresponding time point, at least one of the image information of the retina and the three-dimensional structure information of the retina regarding each of the eyes to be examined is input to the machine learning model as input information, visual field change information representing change of the visual field and obtained based on the visual field related information at the plurality of time points with regard to the corresponding eye to be examine is used as training information, and visual field change information estimated on the basis of the input information is output from the machine learning model.

This invention relates to a UV laser-based system, specifically a UV laser-based system (100) for correcting impaired vision in a patient's eye (10), a UVL-LVC system (100). The UVL-LVC system (100) comprises: a UV laser source (102) designed to emit laser radiation to treat the patient's eye (10); and an imaging optics (124) for focusing the laser radiation onto the cornea (12) of the patient's eye (10), wherein the imaging optics (124) is designed such that it detects the reflection (126) of radiation at a receiving angle χMαχ of at least 2.5°, the radiation being incident on the cornea (12) of the patient's eye (10) through the imaging optics (124) and at least partially reflected from the cornea (12) of the patient's eye (10). The invention also relates to a method for centering the UVL-LVC system (100).

The present disclosure discloses a composition for improving eyesight, and relates to the technical field of food. The composition comprises Plukenetia volubilis oil, citri reticulatae pericarpium oil, and lutein ester. The composition can be prepared into a powder, a tablet, a capsule, a granule, an oral preparation, and a dripping pill. The composition can effectively relieve asthenopia, prevent impaired vision, and improve eyesight, and has a good market prospect.

The invention relates to the technical field of police helmets, and particularly discloses a police protective helmet which comprises a helmet body, and quick release assemblies are symmetrically arranged on the two sides of the outer wall of the helmet body; the quick release assembly comprises a mounting cover fixed with the helmet body; the helmet body comprises a lens mounting area, and a sliding groove which is located above the lens mounting area and is communicated with the lens mounting area is formed in the helmet body; arc-shaped flexible pads are fixed to the two sides of the inner wall of the helmet body, motors are fixed to the gaps between the two flexible pads and the helmet body, the output ends of the motors penetrate through the sliding grooves, a first rotating shaft is fixed to the outer wall of the helmet body, and the first rotating shaft is rotationally connected with the inner wall of the mounting cover; rotating rings I rotationally connected with the rotating shafts I and rotating rings II fixedly connected with the rotating shafts I are sequentially arranged on the outer walls of the rotating shafts I; the problems that lenses of an existing protective helmet are inconvenient to replace, and sight is affected in rainy days are solved.