Purpose: Assess morphophysiological and functional features of the structure of the zonula lens fi bers on the basis of an in-depth analysis consistent with the laws of mechanics. Defi ne the purpose and scope of each portion of the zonula lens fi bers. To analyze the results of the research of studies on the structure of the zonula of Zinn in the different authors of the last two centuries. Identify misconceptions about the work of this executive mechanism of accommodation in different phases of accommodation, this includes the uneven accommodation in different meridians. Determine the incorrectness of those theories of accommodation, which are based on erroneous ideas about the functioning of different portions of the zonula fi bers.Methods: Theoretical analysis based on the laws of mechanics and assessment of the results of interdisciplinary research by different authors in the fi eld of structural and functional features of the Zinn's zonule of the lens in different phases of accommodation.Results: The lens's ciliary belt has been found to have three major portions of fi ber that perform different functions. Powerful anterior portion of fi bers is attached to the anterior surface of the lens bag in a segmented mannered a powerful posterior portion of fi bers is attached to the posterior surface of the lens evenly around the circumference and like a cobweb covering the surface of the vitreous chamber. Both these fi laments in the eye don't cross and in all phases of accommodation remain
have prepared the below, which is limited to the effects of indium gallium nitride (In-Ga-N) LED lighting on humans. Recently the AMA has produced a document cautioning the public about In-Ga-N based LEDs used as sources of illumination both indoors and outdoors. These In-Ga-N LED sources generate short wavelength radiation from a solid state die. Some of that radiation is absorbed by a phosphor that, in turn, reemits long wavelength radiation. Together, the light emitted by the die and the light reemitted by the phosphor appear white to the human eye. Depending upon the relative emissions from the LED package, both the die and the phosphor, the white illumination can appear to have a "warm" tint (yellowish-white) or "cool" tint (bluish-white) or can appear neutral. This solid state lighting technology has, or soon will, displace most other commercially available light sources used for general illumination because they are more energy efficient, have longer life and are more cost effective to own and operate than most other sources of illumination. The concern expressed by the AMA in their report is focused specifically on the short-wavelength emission from these In-Ga-N LED sources as that spectral region might negatively affect, through several modes, human health. Specifically, the following modes are of interest: Blue light hazard Glare, both disability and discomfort Melatonin suppression Circadian disruption To understand the potential risk to human health through each of these modes it is first necessary to characterize the stimulus in terms of its physical properties and then second to relate those stimulus properties to specific, measureable biological outcomes.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.