ABSTRACT
Background: According to computer vision syndrome (CVS). Due to constant use of computers by the students, it has become one of the growing health risks associated with technology (cell phones and tablets). CVS is a combination of eye and vision disorders associated with activities that affect near vision and is experienced in relation to or during the use of computers. The main aim of the study was to find the risk factors of CVS, its symptoms, and other factors associated with CVS. Materials and Methods: In this cross-sectional study, data was collected using a purposely constructed E-questionnaire. The questionnaire consisted of demographic items and items related to the usage of E-devices and the symptoms of eye problems. After data collection, data was coded and entered in the Statistical Package for the Social Sciences (SPSS) ver. 20 software for analyses. Descriptive statistics (mean and standard deviation, frequencies and percentages) were computed. To measure the significant differences, Chi-square test was used at 5% level of significance. Results: The mean (SD) age of 400 respondents was 22.5 (11.5) years. We computed the internal consistency, and the overall Cronbach alpha was 0.81. Also, 40% of the respondents were females, while 60% were males. Results showed that 20% of the respondents had multiple symptoms of eye problems, while 9% had no symptoms, 9% had eye pain, 8% had dryness of eye, and 6% had watering of eyes and redness of eye symptoms. The rest of the symptoms was found in less than 5% of the respondents. Conclusion: This worldwide issue requires immediate attention. Long-term computer use has been linked to significant visual impairments, particularly in people who use computers and similar gadgets for extended periods of time.
ABSTRACT
The Al Aziziah area is built on volcanic and granitic rocks. The igneous rocks always contain a high amount of naturally radioactive elements such as uranium, thorium and potassium, which produce gamma rays causing environmental hazards when exceeding the permissible limit. Radon gas is a result from the decomposition of uranium/thorium leaks into enclosed areas (e.g. homes or offices). This leakage is controlled by many conditions, and one of them is the underlining rock type. To work on such an environmental study, a gamma ray spectrometer survey was used. The uranium, thorium and potassium contents, as well as their ratios and the total radiation, were determined and mapped. The radiation dose rate was calculated and mapped in mSv/y and nGy/h units. The radiation contamination of groundwater is detected from the contour map of the dose rate over the artificial drainage lines of rains and floods which move this water to the groundwater wells. The main results are as follows: granitic rocks show an average dose rate of about 2.4 mSv/y, while the deposits of these rocks have an average dose rate of 1.2 mSv/y. A low average dose is recorded over the basalt. The average radiation dose recorded in the study area is 1.08 mSv/y, while its range is from 0.001 to 4.41 mSv/y. The estimated effective doses within the Al Aziziah area and vicinity area were higher than 1 mSv/y, which is the public exposure limit, and lower than the occupational exposure limit of 20 mSv/y. We recommend ventilating homes and offices in these places on an ongoing basis and constant radon measuring in closed places.
