Objectives: Advances in dental operative microscopes (DOMs) enable examination of root canal morphology or detection of root fractures otherwise not visible to the naked eye. However, dental therapy involving prolonged use of DOMs requires precision within a limited visual field, resulting in eye strain among users. This study examined the effects of halogen and light-emitting diode (LED) light sources on asthenopia and visual function following use of DOMs.
Methods: The study used halogen and LED light sources in DOMs. The first experiment was conducted on 6 participants with corrected visual acuity without any organic eye disease. General visual function test (calculation ability test, hand grip strength test, and ophthalmic examination) and subjective symptom questionnaire were used to evaluate the degree of fatigue before and after DOM use. The second experiment was conducted on 9 participants with spherical equivalents within ±4 diopters (D) and astigmatism of 1 D or less. Accommodative function tests (precise test for asthenopia) and a subjective symptom questionnaire (asthenopia) were used before and after use of DOM.
Results: No significant changes were noted in the degree of fatigue and ophthalmological parameters before and after the procedure with either light source or in between light sources. The tear firm breakup time was shortened after therapy, and a tendency toward dry eyes was observed while using the LED light source.
Conclusions: The halogen and LED light sources used for DOM therapy had similar effects on asthenopia of the operators, with no significant changes in visual function.
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http://dx.doi.org/10.1016/j.job.2020.10.003 | DOI Listing |
Chem Commun (Camb)
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Department of Chemistry, Indian Institute of Technology Ropar (IIT Ropar), Rupnagar, Punjab-140 001, India.
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Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, California, 91125, USA.
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Ningbo Sunpu Led Co., Ltd., Ningbo 315000, China.
Multiple channels are designed for dimmable LED light sources with color temperatures ranging from 2,700 to 6,500 K. However, issues such as Delta uv (D) values <0, lower brightness, luminous efficacy, and color rendering index (CRI), lower power density, exceeding the standard deviation of color matching (SDCM), unconstant power, poor color consistencies, and high costs persist. We present a three-channel LED light source featuring an integrated chip-on-board (COB) package structure.
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State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi Key Laboratory of Sugarcane Biology, Guangxi University, Guangxi, China.
Sugar, the primary product of photosynthesis, is a vital requirement for cell activities. Allocation of sugar from source to sink tissues is facilitated by sugar transporters (ST). These STs belong to the Major Facilitator Superfamily (MFS), the largest family of STs in plants.
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Center of Inflammatory Bowel Disease, Department of Gastroenterology, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.
Vaccination plays a crucial role in safeguarding individuals with inflammatory bowel disease (IBD) from potential epidemics. In light of the resurgence of COVID-19 in China, unvaccinated IBD patients are vulnerable to infection and potentially serious complications. The aim of this study is to assess the vaccination uptake and willingness among IBD patients, as well as to explore the factors influencing their decision to decline vaccination.
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