Patent DE-102007007778-A1 (DE)
Title: Low-risk ocular regulation of photoneural process, useful e.g. for suppressing melatonin secretion, comprises positioning an economical, solarization stable optical filter in the optical path between radiation sources and the eyes
Inventor: WATZKE ECKHART
IPC: G02B5/22
Filed: 2007-02-13
Abstract: Low-risk ocular regulation of photoneural process by the application of selected wavelength range from visible light in photopic viewing range, comprises: positioning an economical, solarization stable optical filter made from organic or inorganic materials, in the optical path between radiation sources and the eyes. The method is useful e.g. for the effective suppression of melatonin secretion, regulating the light sensitivity function of the eyes in photopic vision, decreasing the potential thermal and photochemical retinal damage and visual acuity and reducing the glare. Low-risk ocular regulation of photoneural process by the application of selected wavelength range from visible light, comprises: positioning an economical, solarization stable optical filter made from organic or inorganic materials, in the optical path between radiation sources and the eyes, where the optical filter possesses either transmission spectrum of band pass filter (whose wavelength (lambda T50) lies in the range of 440-480 nm, whose maximal transmission amounts to greater than 70%, whose high transmission range of -5% extends itself at least over the wavelength range of the point of intersection of the circadian effective function with the light sensitivity function for the photopic vision of 500-520 nm and whose wavelength (lambda T'50) in the range of >= 555 nm) or transmission spectrum of long pass filters (whose wavelength (lambda T50) lies in the range of 440-480 nm, whose maximal transmission (Tmax) amounts to greater than 70% and whose high transmission area of -5% extends itself at least over the wavelength range of the point of intersection of the circadian effective function with the light sensitivity function for photopic vision of 500-520 nm) or transmission spectrum of band pass filters (whose wavelength (lambda T50) lies in the range less then 440-480 nm, whose maximal transmission (Tmax) amounts to greater than 70% and whose high transmission area of -5% extends itself at least over the wavelength range of the highest light sensitivity of the light sensitivity function of the human eyes during night viewing of 500-520 nm and whose wavelength (lambda T'50) lies in the range of 560-580 nm). The method is useful in photopic viewing area for effectively suppressing melatonin secretion, regulating the light sensitivity function of the eyes in photopic vision, decreasing the potential thermal and photochemical retinal damage, a good contrast sensitivity and visual acuity, reducing the glare and for a high UV-protection; or in scotopic and mesopic viewing area for effectively increasing the contrast sensitivity and acuity and for reducing the glare. An independent claim is included for an optical filter used in the low-risk ocular regulation of photoneural process, comprising colored plastic glass with transition metal ions; colored polycarbonate with 0.001-0.1 wt.% of copper (II) ions, preferably from Lexan LS2 (RTM: Polycarbonate resin thermoplastic material); colored mineral glass with cerium dioxide, copper oxide, chromium oxide, titanium dioxide and/or iron oxide.