Postoperative between-group differences were significant in dry eye questionnaire scores ( P = 0.0009 , 1 week ; P < 0.0001 , 2 weeks ; P = 0.0001 , 4 weeks ) and TFBUT ( P = 0.004 , 1 week ; P = 0.0003 , 2 weeks ; P = 0.0001 , 4 weeks ) .