Epidemiological investigation and analysis of asthenopia in adult myopes
	    		
		   		
	    	
    	
    	
   		
        
        	
        		- VernacularTitle:成年近视患者视疲劳的流行病学调查及分析
 
        	
        	
        	
        		- Author:
	        		
		        		
		        		
			        		Chengcheng HAN
			        		
			        		;
		        		
		        		
		        		
			        		Ying LI
			        		
			        		;
		        		
		        		
		        		
			        		Lili DAI
			        		
			        		;
		        		
		        		
		        		
			        		Zhengbo SHAO
			        		
			        		;
		        		
		        		
		        		
			        		Chunyu DU
			        		
			        		;
		        		
		        		
		        		
			        		Chang LIU
			        		
			        		
		        		
		        		
		        		
		        		
		        		
			        		
			        		
		        		
	        		
        		 
        	
        	
        	
        		- Publication Type:Journal Article
 
        	
        	
        		- Keywords:
        			
	        			
	        				
	        				
			        		
				        		Asthenopia;
			        		
			        		
			        		
				        		Epidemiology;
			        		
			        		
			        		
				        		Risk factors;
			        		
			        		
			        		
				        		Myopia;
			        		
			        		
			        		
				        		Binocular dysfunction
			        		
			        		
	        			
        			
        		
 
        	
            
            
            	- From:
	            		
	            			Chinese Journal of Postgraduates of Medicine
	            		
	            		 2013;36(z1):29-31
	            	
            	
 
            
            
            	- CountryChina
 
            
            
            	- Language:Chinese
 
            
            
            	- 
		        	Abstract:
			       	
			       		
				        
				        	Objective To assess the prevalence and binocular dysfunctional risk factors associated with asthenopia among adult myopes.Methods The study population included 800 adult myopes,a cross-sectional visual parameters that characterize the accommodative:accommodation amplitude (AA),accommodative facility,and accommodative response (fused crossed cylinder-FCC) and binocular function (near and distant horizontal and vertical associated phorias,near and distance negative and positive fusional vergence,near point of convergence,negative and positive relative accommodation (NRA/PRA),stimulus AC/A ratio and stereoacuity) were evaluated when these subjects wore adequate spectacle correction.Results Asthenopia was reported in 24.2% (194/800) of myopes.The incidence of asthenopia in female (27.8%,128/460) was more than that in male (19.4%,66/340),and there was significant difference (P =0.006).In univariate analysis,the monocular AA,binocular AA,NRA and PRA were significantly associated with asthenopia (P =0.000).In multivariate analysis,low NRA (≤1.25 D),low NRA (≤1.50 D) were significant risk factors for asthenopia (P =0.000,OR =7.644 ;95% CI 2.913-17.580;P =0.000,OR =5.303;95% CI 2.822-16.205).Conclusion Preventive measures directed against the binocular dysfunctional risks factors associated with asthenopia may help reduce the prevalence and provide a positive impact on asthenopia.