The mean TFT before treatment was 2.5 0.4 m. Ten minutes after instillation , TFT significantly increased in the TH-SH group from 2.4 0.4 to 3.1 0.9 m ( P < 0.01 ) and in the HA group from 2.4 0.3 to 2.9 0.5 m ( P < 0.01 ) , whereas no significant change was observed in the NaCl group ( from 2.6 0.4 to 2.7 0.4 m , P = 0.76 ) .