BACKGROUND: Nowadays, in economy of Mongolia there are a lot of mining, construction, transportation and powerplant sectors with high risk, top rate of industrial accidents and occupational disease. Moreover, it’sbeen seen that noise, vibration and dust effect on worker’s health have a huge negative effects inthose sector’s workplaces.GOAL: Based on occupational condition assessment between 2010-2014 of Occupational condition andmonitoring department of Occupational Health Research Center, noise, vibration and general dustwere measured at workplace of mining, construction and power plant sectors.MATERIAL AND METHODS: Some issues of occupational hygiene were cross sectional studies. Based on archive of OHRC,information has been collected by fact methods. The results have been processed statistically onSPSS-17 statistic program and have been compared with relevant standards and normative.RESULTS: From 740 workplaces at 89 enterprises in 3 sectors, in 686 noises level has been measured. Theaverage level of noise measurements has been above the maximum allowed amount standards. Thehighest results were in sector of mining and construction.At total of 166 workplaces, the average vibration level was also above of maximum allowed amount.And also the highest results were seen in sector of mining.At total of 447 workplaces, the average general dust level was 3-5 times more than maximum allowedamount and the highest results were seen I sector of mining and construction.From some measurements of occupational hygiene at workplaces that attended in this study, generaldust amounts and vibration levels are straight low related and have a statistical importance.CONCLUTIONS:The amount of general vibration, noise and general dust in this research at sectors of construction,mining and power plant were higher than the standard of allowed amounts.

Purpose: To investigate the outcomes of ROP screening of retinopathy of prematurity (ROP). Methods: This was a prospective of prematurity infants screened ROP from 2020 April 13th to April 28th 2020 and from 2020 June 08 th to June 22th 2020 and prospective cohort study of premature infants with treatment-requiring ROP who received intravitreal injections, laser surgery. Demographic factors, diagnosis and clinical course were recorded. Indirect ophthalmoscopy and Retinal imaging was performed using RetCam (Natus Medical, Pleasanton, CA) and images were taken. Each eye was evaluated by the pediatric ophthalmologist and aimag’s ophthalmologist for the presence or absence of ROP, zone of vascularization, stage, plus disease, and aggressive posterior ROP (AP-ROP). The diagnosis and classification of ROP for this current study were determined by examination using indirect ophthalmoscopy, and treatment plans were determined according to the International Classification for ROP and the Early Treatment for ROP Study (ET-ROP).^2,13 Results: A total of 90 premature infants with BW ≤ 2000g and/or GA ≤ 34 weeks were screened for ROP during the study period. 8 (8.8%) of the 90 infants screened required treatment. The 8 infants who received ROP treatment had a mean GA of 28.5 ± 1.7 weeks, mean BW of 1237.5 ± 125.42g, mean PMA of 36 weeks and mean follow-up time of 2 months. Conclusion After treatment, resolution of ROP was noted in approximately 100 % of the patients who had treatment-requiring ROP.