Effect of Loose Masks on Tear-film Break-up Time
	    		
		   		
		   			
		   		
	    	
    	 
    	10.3341/jkos.2023.64.5.367
   		
        
        	
        	
        	
        		- Author:
	        		
		        		
		        		
			        		Jooheon LEE
			        		
			        		
			        		
			        			1
			        			
			        		
			        		
			        		
			        		
			        		;
		        		
		        		
		        		
			        		Minwon AHN
			        		
			        		;
		        		
		        		
		        		
			        		Jaewon CHOI
			        		
			        		;
		        		
		        		
		        		
			        		Minji PARK
			        		
			        		
		        		
		        		
		        		
		        		
		        			
			        		
			        		Author Information
			        		
		        		
		        		
			        		
			        		
			        			1. Sungmo Eye Hospital, Busan, Korea
			        		
		        		
	        		
        		 
        	
        	
        	
        		- Publication Type:Original Article
 
        	
        	
            
            
            	- From:Journal of the Korean Ophthalmological Society
	            		
	            		 2023;64(5):367-373
	            	
            	
 
            
            
            	- CountryRepublic of Korea
 
            
            
            	- Language:Korean
 
            
            
            	- 
		        	Abstract:
			       	
			       		
				        
				        	 Purpose:We investigated the the effect of wearing a loose mask on tear-film break-up time using cross-sectional and experimental methods. 
				        	
				        
				        	Methods:This was a comparative analysis of non-invasive tear-film break-up time (NIBUT) after wearing no mask, loose mask, and tight mask for 10 minutes each in 60 eyes with or without dry eye syndrome. NIBUT measurements were performed using a keratograph. 
				        	
				        
				        	Results:The NIBUT values were 7.53 ± 0.83 seconds, 6.19 ± 0.78 seconds, and 7.36 ± 0.68 seconds for the no mask, loose mask, and tight mask groups, respectively. There was no significant difference between the no mask and tight mask groups (ρ-value = 0.517), but the loose mask group had a significantly reduced NIBUT compared with the other groups (ρ-value = 0.013 and 0.022, respectively). 
				        	
				        
				        	Conclusions:Wearing a loose mask reduced the tear-film break-up time regardless of the presence or absence of dry eyes and may cause or worsen dry eye symptoms.