Night vision

About: Night vision is a research topic. Over the lifetime, 6004 publications have been published within this topic receiving 67372 citations.

Effects of a night vision enhancement system (nves) on driving: results from a simulator study

Abstract: Effects of a night vision enhancement system (NVES) on driving : Results from a simulator study

Predictive factors for photic phenomena after refractive, rotationally asymmetric, multifocal intraocular lens implantation

Abstract: Aim To investigate the independent factors associated with photic phenomena in patients implanted with refractive, rotationally asymmetric, multifocal intraocular lenses (MIOLs). Methods Thirty-four eyes of 34 patients who underwent unilateral cataract surgery, followed by implantation of rotationally asymmetric MIOLs were included. Distance and near visual acuity outcomes, intraocular aberrations, preferred reading distances, preoperative and postoperative refractive errors, mesopic and photopic pupil diameters, and the mesopic and photopic kappa angles were assessed. Patients were also administered a satisfaction survey. Photic phenomena were graded by questionnaire. Independent-related factors were identified by correlation and bivariate logistic regression analyses. Results The distance from the photopic to the mesopic pupil center (pupil center shift) was significantly associated with glare/halo symptoms [odds ratio (OR)=2.065, 95% confidence interval (CI)=0.916-4.679, P=0.006] and night vision problems (OR=1.832, 95% CI=0.721-2.158, P=0.007). The preoperative photopic angle kappa was significantly associated with glare/halo symptoms (OR=2.155, 95% CI=1.065-4.362, P=0.041). The photopic angle kappa was also significantly associated with glare/halo symptoms (OR=2.155, 95% CI=1.065-4.362, P=0.041) and with night vision problems (OR=1.832, 95% CI=0.721-2.158, P=0.007) in patients implanted with rotationally asymmetric MIOLs. Conclusion A large pupil center shift and misalignment between the visual and pupillary axis (angle kappa) may play a role in the occurrence of photic phenomena after implantation of rotationally asymmetric MIOLs.

Night vision image capturing apparatus and infrared radiating apparatus and night vision image capturing system

Abstract: An imaging device (31) includes pixels (32, 33, 34) configured to sequentially output image signals for an infrared radiation (14a) having a first wavelength, an infrared radiation (14b) having a second wavelength and an infrared radiation (14c) having a third wavelength. A first pixel (32) has the sensitivity to a first color of a primary color and outputting a first signal in response to reception of the infrared radiation (14a) having the shortest wavelength of the first wavelength, the second wavelength and the third wavelength. A second pixel (34) has the sensitivity to a second color of the primary color and outputting a second signal in response to the reception of the infrared radiation (14a) having the shortest wavelength. A discriminating circuit (39) is configured to compare the first signal and the second signal with each other to discriminate a reception timing of an infrared radiation (14a) having a selected wavelength in response to a relative sensitivity ratio.

Impaired vision assist system and method

Abstract: A night vision system, suitable for vehicular use, including an infra-red detector mounted on a vehicle, a display mounted on the vehicle, a single-element lens mounted upstream of the infra-red detector so as to direct light from a scene onto the infra-red detector, and circuitry operative to receive a detector output from the infra-red detector and to provide an image output based on the detector output to the display. The system is suitable for applications other than vehicular use, where a comparatively narrow field of view is to be imaged.