66 results about "Photopic vision" patented technology

A corneal inlay protects ocular structures from harmful wavelengths of light while maintaining acceptable color cosmetics, color perception, overall light transmission, photopic vision, scotopic vision, color vision, and / or cirdadian rhythms. The corneal inlay can also include a pinhole effect to increase depth of focus. In some embodiments, the corneal inlay can also correct refractive errors including, but not limited to, higher order aberration, lower order aberration, myopia, hyperopia, astigmatism, and / or presbyopia.

A film suitable for use in an ophthalmic system is provided. The film may selectively inhibit blue light within the wavelength range of 400 nm to 460 nm to reduce phototoxic light to the eye while maintaining photopic vision, and may be color balanced to allow for the system into which the film is incorporated to be perceived as colorless to a viewer observing and / or using the system. The system may have a photopic and scotopic luminous transmission of 85% or more and a phototoxicity ratio of less than 80%. When used in an ophthalmic system or other system disposed between an observer's eye and a light source, the film may reduce the flux of blue light to the internal structures of the eye while reducing or minimizing dilation of the pupil.

The invention relates to eye-protecting brain-strengthening effervescent tablets for supplementing nutrient to human bodies. The effervescent tablets consist of active ingredients, a pharmaceutically acceptable acid-base pair and excipients, wherein the active ingredients are utein ester, taurine and docosahexaenoic acid (DHA); the pharmaceutically acceptable acid-base pair comprises an acid compound and an alkaline compound; and the excipients are a filler, an adhesive, a lubricant, a sweetener and a flavoring agent. Through the experiments, the effervescent tablets have remarkable effects of promoting the memory acquisition and memory recurrence of passive avoidance response and spatial discrimination capacity of mice. The effervescent tablets have remarkable effects of improving symptoms such as blurred vision, dry eyes, eye swelling, ophthalmodynia, photophoby and the like, and can remarkably improve the persistence of photopic vision of both eyes; and the effervescent tablets have remarkable effects of strengthening brains and protecting eyes according to the criterion.

The invention discloses a retroreflection coefficient measurement method adopting spectral correction. The retroreflection coefficient measurement method utilizes a retroreflection coefficient measurement device to realize measurement. The retroreflection coefficient measurement method comprises the following steps of adjusting the retroreflection coefficient measurement device, carrying out measurement by a spectral measurement instrument (302) to obtain relative radiation intensity spectral distribution of reflected light, correcting a human eye photopic vision function (lambda) by software to obtain relative radiation intensity spectral distribution of the reflected light at a certain geometric test angle, inputting a calibration coefficient of the spectral measurement instrument (302) into a control / processing module (5), putting a sample needing to be tested in an appointed position on a sample table (201), carrying out testing under different test geometric conditions, and carrying out correction by the calibration coefficient to obtain a retroreflection coefficient of the tested sample. The retroreflection coefficient measurement method utilizes a standard reflecting plate to realize spectral correction, greatly reduces an uncertainty component of a system, and improves accuracy and stability of measurement of a retroreflection coefficient of a retroreflection material.

The invention relates to a design method of free-form surface glasses based on a wave-front technology, which has the technical characteristics that length data of each part of an eye axis is substituted into an eye optical model; a cornea surface curvature and a corneal topography data replace the eye model; wave-front aberration data of actual human eyes is converted into a corresponding value under photopic vision; an individualized eye model which accords with an actual human eye visual property is established; a lens is arranged in front of the individualized eye model; the lens and the individualized eye model are considered as a uniform lens-eye optical system and a certain visual field angle is arranged for the system; a plurality of structures with different angles are arranged for the lens-eye optical system; and the free-form surface glasses according with an individual eye visual property, and the diopter and the structural parameters thereof are calculated. The free-form surface lens obtained by the design method disclosed by the invention, low-order aberration of the eyes can be corrected and high-order aberration can be better corrected; and the design method has the advantages of simplicity and convenience for designing, objectiveness and accuracy, and high precision.

The embodiments of the invention provide a pair of VR glasses and a degree-of-myopia adjusting method thereof, which relate to the technical field of intelligent wearing. The pair of VR glasses enables myopia users to see a virtual image clearly, and is simple to operate. The pair of VR glasses comprises a glasses body, and a lens, a display screen and a control module which are arranged on the glasses body. The control module is used for controlling display of the display screen. The pair of VR glasses further comprises a driving module and a driving controller which are arranged on the glasses body. The driving module is used for driving the lens to move under the control of the driving controller in order to adjust the distance between the lens and the display screen. The control module is further used for making the display screen display a degree-of-myopia selection interface, and the degree-of-myopia selection interface displays a variety of degree options from 0. According to the selected degree of myopia, the driving controller controls the driving module in order to make the distance between the lens and the display screen correspond to the selected degree of myopia so that the picture displayed by the display screen is within the photopic vision distance range of the human eyes.

The invention relates to an eye protection desk lamp with a light-emitting diode (LED) light source. The eye protection desk lamp with the LED light source comprises a base, a lamp shade, a connecting body of which the two ends are respectively connected with the base and the lamp shade, a light-emitting body which is arranged in the lamp shade, a driving power supply which is electrically connected with the light-emitting body, and a control device for controlling the driving power supply. The light-emitting body is an LED combined light source and at least comprises a first sub-light source and a second sub-light source, a circadian rhythm-photopic vision (C / P) value of first sub-light source emergent light is more than 2.5, the C / P value of second sub-light source emergent light is less than 2.5, and the control device controls the C / P value of light-emitting light source emergent light to be between the C / P value of the first sub-light source emergent light and the C / P value of the second sub-light source emergent light or to be equal to one of the C / P values. The eye protection desk lamp with the LED light source has the substantial characteristics that: by controlling the intensity of the light of all the sub-light sources of the combined light source, the final total C / P value of the combined light source and the intensity of the light are controlled to change along with the variation of time, the effect of simulating natural light is achieved, and the eye protection desk lamp with the LED light source adapts to the physiological cycle variation of human bodies.

The invention is suitable for the technical field of an illumination spectrum, and provides a comprehensive evaluation optimization method for a light source vision and non-vision effect performance. The comprehensive evaluation optimization method comprises the following steps of obtaining a non-vision biological effect matching function c<->(lambda), a scotopic vision matching function s<->(lambda) and a photopic vision matching function p<->(lambda) according to a spectrum-sensitive curve of a non-vision biological effect C(lambda), a scotopic vision V'(lambda) and a photonic vision V(lambda); according to the c<->(lambda), the s<->(lambda) and the p<->(lambda) and the arrangement relationship of light source spectrums, obtaining radiation efficiency functions of the C(lambda), the V'(lambda) and the V(lambda), and performing unification for obtaining three stimulus values C, S and P which correspond with the C(lambda), the V'(lambda) and the V(lambda); calculating c, s and p, and establishing a CSP spectrum locus diagram according to the c, the s and the p; drawing a coordinate which corresponds with an equal-energy white and black-body radiation light source on the CSP spectrum; and drawing an S / P value spectrum and a C / P value spectrum on the CSP spectrum. According to the comprehensive evaluation optimization method, related visions are integrated and unified, thereby facilitating comprehensive performance improvement of different visions and realizing accurate calculation; and furthermore light source spectrum optimization is facilitated, thereby satisfying a requirement for required visual performance.

A lighting device includes a lower irradiation portion for irradiating light mainly in a vertically downward direction and an upper irradiation portion for irradiating light more horizontally than the lower irradiation portion. An irradiation angle of the upper irradiation portion is smaller than that of the lower irradiation portion. The upper irradiation portion is configured to reduce an S / P ratio denoting a ratio of scotopic vision luminance to photopic vision luminance.

The present invention discloses a LED health lighting evaluation method and an LED health lighting lamp based on a biological effect. The LED health lighting lamp comprises an LED light source, a driving power supply which is connected to the LED light source, a control device (3), an illuminance measurement module corrected by a spectral response function obtained based on physiological parameter change of a human body under an LED light source illuminance condition, a luminous flux measurement instrument formed by a data processing module, and a background brightness measurement module. The LED health lighting evaluation method and the LED health lighting lamp is characterized in that the LED light source with different spectral components is subjected to biological equivalence evaluation, firstly the B / P value of the LED light source with different spectral components are stored in the memory of the luminous flux measurement instrument, a photopic vision illuminance is measured, an equivalent illuminance is the product of a photopic vision illuminance value and the B / P value, and according to the biological lighting effect needs to be realized, the spectral, color temperature and brightness adjustment of the LED light source are carried out through driving the control device so as to satisfy different lighting needs.

The invention discloses an augmented reality display device capable of rapidly switching image depths. The device comprises an image source, an imaging unit and a control unit, wherein the image source is used for generating an image with a corresponding depth; the imaging unit includes several depth regulators distributed in a laminated mode, wherein the depth regulators are used for controllinga diffraction angle of light reflected by the depth regulators so that the image generated by the image source carries out imaging at a position which has a corresponding depth with human eyes; and the control unit selects the corresponding depth regulator to carry out reflection diffraction imaging on the image according to a color component of the image generated by the image source and depth information. By using the augmented reality display device, through adjusting of the imaging unit, the image from a human eye photopic vision distance to an infinite depth can be generated in a space; true three-dimensional light field display can be realized; and a visual convergence adjustment conflict can be effectively solved and a user experience is improved.

This invention relates to an ophthalmic lens comprising a transparent substrate with a front main face and with a rear main face, at least one of the main faces being coated with a multilayered antireflective coating comprising a stack of at least one high refractive index layer (HI) having a refractive index higher than or equal to 1.55 and at least one low refractive index layer (LI) having a refractive index lower than 1.55, characterized in that said multilayered antireflective coating has: a mean light reflection factor in the visible region for photopic vision Rv lower than or equal to 2.5%, preferably lower than or equal to 0.9%, for at least an angle of incidence lower than 35°; a mean light reflection factor in the visible region for scotopic vision Rv′ lower than or equal to 0.5%, preferably lower than or equal to 0.4%, for at least an angle of incidence lower than 35°.

The invention discloses a traditional Chinese medicine composition for relieving asthenopia and a preparation method thereof. The composition is prepared from medicinal materials of panaxadiol saponins, cassia twig, angelica sinensis, astragalus membranaceus, peach kernel, ligusticum wallichii, radix angelicae, wolfberry, semen cuscutae, earthworm and the like. The invention also provides the preparation method for the traditional Chinese medicine composition for relieving asthenopia. The traditional Chinese medicine composition can effectively improve asthenopia and distant vision as well as photopic vision persistence, and realizes the function of relieving asthenopia.

System and methods are provided to promote effortless automatic recognition of common sight words. A subject performs a game-like task that generates novel non-verbal visual stimuli that triggers visual attention shifts that enhance foveal and parafoveal recognition of non-verbal and verbal stimuli laterally presented in the right or left visual field. The present invention engages a shared motor-perceptual-cognitive neural network involving oculomotor, visuo-motor and selective executive cognitive behaviors on both brain hemispheres. The present invention has applications to a wide range of non-verbal pre-orthographic visual processes and early lexical processes, not only contributing to enabling reading fluency to dyslexics, reluctant and slow readers, but also to beginning readers. The present invention has wide applications in learning disabilities and normative individuals learning to read.

A low-glare motor-vehicle includes a color reproduction index Ra of at least 70 and a reduced reflection for each of the illuminants A and C in scotopic vision (at night) as compared with photopic vision (in the daylight) by at least 3%. In one embodiment, the mirror consists of a transparent substrate, a thin transparent metallic layer, an adapted dielectric layer and the reflector properly speaking.

Provided is a method for improving day photopic vision and / or cone-derived visual field and visual function in a subject suffering from a retinal disease or trauma including administering to the subject a pharmaceutically effective amount of crude Dunaliella powder. Also provided is a method for improving night vision and / or rod derived visual field in a subject suffering from a retinal disease including administering to the subject a pharmaceutically effective amount of crude Dunaliella powder. A pharmaceutical composition for improving day vision and / or visual field in a subject suffering from a retinal disease including crude Dunaliella powder is also provided.

The invention discloses a compound lutein solid preparation for relieving asthenopia and improving a vision function. The compound lutein solid preparation is characterized by comprising the following raw materials: 1-10 parts of lutein, 20-50 parts of vitamin A, 20-50 parts of vitamin C, 20-50 parts of vitamin E, 5-30 parts of vitamin B1, 1-5 parts of natural copper and 5-10 parts of natural zinc. Besides, the invention also discloses a preparation method for the compound lutein solid preparation. The compound lutein solid preparation disclosed by the invention can obviously relieve asthenopia and improve the vision function of the patient, and meanwhile can greatly increase the photopic vision persistence, and the total efficiency is as high as above 60%; and meanwhile, the symptoms of the patient, including blurred vision, dry eyes, eye distension, sore eyes, photaesthesia, and the like, can be greatly relieved.

The invention provides an optical imaging system and a head-mounted display device. The optical imaging system comprises a display screen and a lens group, the display screen is located on the side, away from the human eyes, of the lens set and comprises a display panel and a cover plate, the cover plate is arranged on the side, facing the lens set, of the display panel, and the thickness range of the cover plate is related to the equivalent image space focal length of the lens set, the refractive index of the cover plate and the photopic vision distance of the human eyes. The invention provides an optical imaging system and a head-mounted display device, which can enable poor display caused by foreign matters between a display screen and a lens group not to be easily perceived by human eyes.

The invention discloses a full-photopic-vision microorganism solid-state fermentation tank, comprising a tank body provided with an inner container, wherein the inner container is densely provided with micropores, the tank body is provided with a feed hole, a tail gas and waste liquid discharge hole, a hollow shaft movably connected to two ends of the tank body, and a motor driving the tank body to rotate; one end of the hollow shaft penetrates through the tank body and then penetrates through a connector at the end part of the tank body, the end part of the end of the hollow shaft is provided with a through hole, and the hollow shaft located inside the tank body is provided with a gas exhaust hole; connectors on two ends of the tank body are arranged on stands through bearings and bases of the bearings and are provided with driving wheels, and the driving wheels are connected with driving wheels arranged on motor shafts through transmission belts. The tank body is provided with a pressure gauge, a thermometer and the like.