FAKTOR YANG BERHUBUNGAN DENGAN KELUHAN KELELAHAN MATA PADA PENGGUNA KOMPUTER DI STIKES HANG TUAH PEKANBARU TAHUN 2020

Kelelahan mata adalah gangguan yang dialami mata karena otot-ototnya yang dipaksa bekerja keras terutama saat harus melihat objek dekat dalam jangka waktu lama. Tujuan penelitian ini adalah ntuk mengetahui hubungan antara karakteristik pekerja dan perangkat kerja dengan keluhan kelelahan mata pada pengguna komputer. Penelitian ini merupakan penelitian analitik kuantitatif dengan menggunakan desain studi cross sectional, dengan responden kasus adalah pekerja yang menggunakan komputer di STIKes Hang Tuah Pekanbaru. Jumlah sampel dalam penelitian ini adalah 46 orang. Teknik pengambilan sampel pada kasus adalah non probability sampling. Alat ukur yang di gunakan adalah kuesioner, dan pengukuran. Analisis yang di gunakan adalah univariat dan bivariat dengan uji statistik Chi-square. Hasil penelitian menunjukkan bahwa ada hubungan yang signifikan antara usia (Pvalue=0,024, nilai OR=5,409), durasi penggunaan komputer (Pvalue=0,020, nilai OR=5,143), jarak pandang mata dengan monitor (Pvalue=0,009, nilai OR=6,500) dengan kelulahan kelelahan mata. Hasil penelitian menunjukkan tidak ada hubungan signifikan antara penggunaan anti glare (Pvalue=0,457, nilai OR=1,929) dengan keluhan kelelahan mata. Disarankan kepada pekerja menjaga jarak mata dengan layar monitor, melakukan istirahat mata sekitar 10 menit stiap jam, dan mengatur pencahayaan monitor dalam menggunakan komputer. Eye fatigue is a disorder experienced by the eye because the muscles are forced to work hard, especially when they have to look at close objects for a long time. The purpose of this study was to determine the relationship between the characteristics of workers and work equipment with complaints of eye fatigue in computer users. This research is a quantitative analytic study using a cross sectional study design, with case respondents being workers who use computers at STIKes Hang Tuah Pekanbaru. The number of samples in this study were 46 people. The sampling technique in this case is non-probability sampling. The measuring instrument used is a questionnaire, and measurement. The analysis used was univariate and bivariate with Chi-square statistical test. The results showed that there was a significant relationship between age (P value = 0.024, OR value = 5,409), duration of computer use (P value = 0.020, OR value = 5.143), distance between eyes and monitor (Pvalue = 0.009, OR value = 6,500) with complaints of eye fatigue. The results showed that there was no significant relationship between the use of anti-glare (P-value = 0.457, OR = 1.929) with complaints of eye fatigue. It is recommended for workers to keep their eyes away from the monitor screen, take an eye break of about 10 minutes every hour, and adjust the lighting of the monitor when using the computer.

Determinants of Using Gadget to Concentration, Complaints of Eye Fatigue and Student Learning Motivation at SMKN 7 Malang

The development of information and communication technology brings an influence on many fronts, is no exception in the world of education. Including the use of gadgets that increasingly exist in the world of education. But the use of gadgets must also be monitored by the duration, frequency and intensity that support concentration, reduce eye fatigue complaints and motivation to learn for the better. The purposes of this study are to explain the influence of duration, frequency and intensity of gadget use on student concentration, eye fatigue complaints, students learning motivation at SMKN 7 Malang. This research design uses a correlative study with a quantitative approach. The research subjects were 195 students. Data collection techniques using a questionnaire. The data analysis technique used multiple linear regression analysis. The results of this research indicate that: there was a negative influence of duration, frequency, and intensity of using gadget on student concentration at SMKN 7 Malang. There was a positive influence of duration, frequency, and intensity of using gadget on student eye fatigue complaints at SMKN 7 Malang. There is a negative influence of duration, frequency, and intensity of using gadget on students learning motivation at SMKN 7 Malang. This study shows that there is a need for health promotion so that students reduce the duration, frequency of using gadgets as an effort to increase concentration, prevent eye fatigue and increase learning motivation.

Presbyopia developed earlier during the COVID-19 pandemic

Purpose The aim of this cohort study was to evaluate the development and progression of presbyopia and the status of dry eye-related symptoms from 2017 to 2020, to assess the impact of the COVID-19 pandemic. Methods Near add power at 30 cm was measured in 339 participants aged between 40 and 55 from 2017 to 2021 at Japanese eye clinics. Regression analysis of near add power and age was analyzed to compare 2017 with later years up to the pandemic. The prevalence of dry eye-related signs and six common symptoms were compared. Results The number and mean age (y) of participants were 183 (48.6±4.1) in 2017, 46 (51.3±7.5) in 2019, and 110 (49.2±3.7) in 2020–21, respectively. The mean progression rate of near add power (D/y) was 0.13 for 2017, 0.09 for 2019 (P = 0.028, vs 2017), and 0.08 for 2020–21 (P<0.001, vs 2017). The slope (rate of presbyopia progression) became flatter from 2017 to 2021 and the estimated near add power at the age of 40 increased from 2017 to 2020–2021, implicating presbyopia developed earlier and worsened during the study period. The 2017 values were comparable with previous studies described in 1922 and 2019. The standardized correlation coefficient between age and near add power was 0.816 for 2017, 0.671 for 2019 (P = 0.084, vs 2017), and 0.572 for 2020–21 (P<0.001, vs 2017). Multiple regression analysis revealed age and COVID-19 pandemic were significantly correlated with near add power. The prevalence of dryness irritation, and pain was greater in 2020–21 than in 2017 with no difference in the prevalence of eye fatigue, blurring, and photophobia. There was no difference in the prevalence of short tear break-up time and positive corneal staining among 2017, 2019 and 2020–21. Conclusion Estimated presbyopia developed earlier and progressed slower from 2017 to 2021, the COVID-19 pandemic. Stress and rapid digitalization related to strict infection control and quarantine might be contributing factors.

FATIGUE FAILURE AS A COMPLEX OF RELAXATION PROCESSES OCCURRED AT THE VERTICES OF THE STRESS RISERS

This paper considers the stress-dependent fatigue life of polycrystalline materials and their fatigue failure as a result of the relaxation processes that occurred on the stress risers of various scales: macroscopic stress risers of technological nature (pores, cracks, surface roughness, etc.), and microscopic stress risers at the grain/subgrain boundaries and/or second phase particles. Participation of the relaxation mechanisms plastic (vacancies and dislocation activities, grain boundary sliding) and brittle (cracks) nature in the process of the ‘fish eye’ fatigue crack formation is also addressed. The model described the parabolic dependencies of the densities of elementary carriers of plastic and brittle relaxations on the load change rate (i.e., on the growth rate of the stresses concentrated at the vertices of the stress risers) correlates well to the fatigue life data observed for the surface-modified metallic materials.

A Spiking Visual Neuron for Depth Perceptual Systems

The biological visual system encodes information into spikes and processes them parallelly by the neural network, which enables the perception with high throughput of visual information processing at an energy budget of a few watts. The parallelism and efficiency of bio-visual system motivates electronic implementation of this biological computing paradigm, which is challenged by the lack of bionic devices, such as spiking neurons that can mimic its biological counterpart. Here, we present a highly bio-realistic spiking visual neuron based on an Ag/TaOX/ITO memristor. Such spiking visual neuron collects visual information by a photodetector, encodes them into action potentials through the memristive spiking encoder, and interprets them for recognition tasks based on a network of neuromorphic transistors. The firing spikes generated by the memristive spiking encoders have a frequency range of 1-200 Hz and sub-micro watts power consumption, very close to the biological counterparts. Furthermore, a spiking visual system is demonstrated, replicating the distance-dependent response and eye fatigue of biological visual systems. The mimicked depth perception shows a recognition improvement by adapting to sights at different distance. Our design presents a fundamental building block for energy-efficient and biologically plausible artificial visual systems.

Myopia-correcting lenses decrease eye fatigue in a visual search task for both adolescents and adults

The steady, world-wide increase in myopia prevalence in children over the past decades has raised concerns. As an early intervention for axial-length-related myopia, correcting lenses have been developed (such as Defocus Incorporated Multiple Segment (DIMS) lenses), which have been shown to be effective in slowing myopia progression. Beyond this direct effect, however, it is not known whether such lenses also affect other aspects important to the wearer, such as eye fatigue, and how such effects may differ across age, as these lenses so far are typically only tested with adolescents. In the present work, we therefore investigated perceived fatigue levels according to lens type (normal vs DIMS) and age (adolescents vs adults) in a demanding visual search task (“Finding Wally”) at two difficulty levels (easy vs difficult). Whereas age and difficulty did not result in significant differences in eye fatigue, we found a clear reduction of fatigue levels in both age groups when wearing the correcting lenses. Hence, the additional accommodation of these lens types may result in less strain in a task requiring sustained eye movements at near viewing distances.

Kelelahan Mata dan Keluhan MSDs Perkuliahan Daring Selama Pandemi COVID-19 pada Mahasiswa di Tiga Fakultas Universitas Sari Mulia (Program Studi Teknik Industri, D-IV Promosi Kesehatan dan Program Studi Manajemen)

The spread of COVID-19 cases is very fast, affecting all sectors. One of these sectors is educational institutions. In order for the learning process to continue, an online learning system was implemented. Online learning causes an increase in sitting rather than standing, activity in front of a smartphone or laptop. The purpose of this study is to identify eye fatigue and MSDs complaints in students at three study programs, Industrial Engineering, DIV-Health Promotion and Management. The data was collected through an online survey of students. This study used a descriptive analysis research design with a cross sectional approach with the number of respondents 55 students. The results showed that eye fatigue was mostly experienced with sore eyes as many as 35 students (63.63%). Then followed by headaches as many as 34 people (61.81%) and watery eyes as many as 23 people (41.81%). Meanwhile, the majority of MSDs complaints among students were at the waist as many as 34 people (61.8%), on the upper neck as many as 33 people (60%) and on the lower neck as many as 25 people (45.5%). Penyebaran yang kasus COVID-19 yang sangat cepat, berdampak terhadap semua sektor. Salah satu sektor tersebut adalah institusi pendidikan. Agar proses pembelajaran tetap berjalan, maka dilaksanakan sistem pembelajaran daring. Pembelajaran daring menyebabkan terjadinya peningkatan aktivitas duduk daripada berdiri, aktivitas di depan smartphone atau laptop. Selain itu, pembelajaran daring dapat meningkatkan kelelahan mata karena aktivitas di depan smartphone atau laptop. Tujuan dari penelitian ini yaitu mengidentifikasi kelelahan mata dan keluhan MSDs pada mahasiswa di tiga program studi yaitu Program Studi Teknik Industri, Program Studi DIV-Promosi Kesehatan dan Program Studi Manajemen. Pengumpulan data dilakukan melalui survei secara daring terhadap mahasiswa. Penelitian ini menggunakan desain penelitian analisis deskriptif dengan pendekatan cross sectional dengan jumlah responden 55 orang mahasiswa. Hasil penelitian didapatkan keluhan kelelahan mata yang paling banyak dialami oleh responden adalah mata perih sebanyak 35 orang mahasiswa (63,63%). Kemudian diikuti keluhan sakit kepala sebanyak 34 orang (61,81%) dan mata berair sebanyak 23 orang (41,81%). Sedangkan untuk keluhan MSDs pada mahasiswa adalah mayoritas pada bagian pinggang sebanyak 34 orang (61,8%), pada bagian leher atas sebanyak 33 orang ( 60%) dan pada bagian leher bawah sebanyak 25 orang (45,5%).

Comparison of Tooth Shade Colour Recorded Using Digital Single Lens Reflex Camera and Mobile Cameras with Manually Adjusted Parameters

BACKGROUND Visual selection by using shade guides is the most common but also the most subjective technique, influenced by factors such as the age of the observer and eye fatigue. Digital imaging provides a practical and consistent method of determining tooth colour. A suitable alternative for DSLR cameras may be a mobile phone camera. Recent smart phones have manual control which helps to manually adjust parameters. Female patients usually use lipstick, which may alter the tooth colour perception, but there is no clinical evidence showing the effect of lipstick on tooth shade. The purpose of this study was to evaluate the reliability of using phone camera and the effect of lipstick on the shade of the tooth. METHODS This study was conducted on 11 female individuals within the age of 18 - 25 years. Eight photographs were made of all 11 participants, using 3 different smart phone cameras and Nikon D3400 DSLR camera with twin flash and cross-polaroid filter was used as the control group. The parameters of all the cameras were standardized for every image. All digital photographs were evaluated with a Digital Colour Meter software, which gave the parameters in the RGB colour codes and CIE L, a*b* colour space. RESULTS There was no statistically significant difference in the L* and R* values between the control and the smartphone camera groups. There was no statistically significant difference in L* and R* values before and after applying lipstick in all the groups. There was no significant difference in L* and R* values in all the groups before and after applying lipstick. CONCLUSIONS Recent smartphone cameras with manually adjusted parameters including unprocessed or RAW images can be used as a reliable tool for shade matching. Shade matching can be done even after applying lipstick, as there was no difference seen in this study. KEY WORDS Esthetics, Shade, Lipstick, Spectophotometer, Shade