Effects of small incision lenticule extraction and femtosecond laser-assisted <i>in situ</i> keratomileusis on choroidal thickness and blood flow density in patients with myopia.

Changes in CT in the SMILE group CT-C, CT-N1, CT-N2, CT-S1, CT-S2, CT-I1 and CT-I2 were significantly increased at 1 week postoperatively compared with their preoperative levels (P<0.001), followed by a decreasing trend and the return to preoperative thickness by 3 months after surgery (P>0.05).

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