METHODS: Totally 76(152 eyes)adolescents with moderate to low myopia who were admitted to the department from January 2016 were enrolled. According to the voluntary principle, they were divided into orthokeratology group(OK group, n=36 cases, 72 eyes)and orthokeratology combined with atropine of low concentration group(combination group, n=40 cases, 80 eyes). The OK glasses were given for the two groups. The combination group was additionally given 0.1g/L atropine eye drops. All were followed up for 1a. The changes of uncorrected visual acuity, diopter, axial length, intraocular pressure, tear film function and corneal parameters were measured before and after wearing glasses. The incidence of complications was statistically analyzed.

RESULTS: There were no significant differences in uncorrected visual acuity, diopter, axial length and intraocular pressure between the two groups before wearing glasses and at 1a of wearing glasses(P>0.05). The change of uncorrected visual acuity before wearing glasses and at 1a of wearing glasses of combination group was higher than that of OK group while the differences in diopter and axial length were lower than those of OK group(P<0.05). Before wearing glasses, there were no significant differences in the lipid layer thickness(LLT), object scattering index(OSI)or tear film rupture time(tear film break-up time, BUT)between the two groups(P>0.05). At 1a of wearing glasses, LLT and BUT of combination group were higher than those of OK group while OSI was lower than that of OK group(P<0.05). Before wearing glasses, there were no significant differences in corneal curvature, corneal thickness or anterior chamber depth between the two groups(P>0.05). At 1a of wearing glasses, the changes of above indexes of combination group were lower than those of OK group(P<0.05). There was no significant difference in the incidence of complications between the two groups(P>0.05).

CONCLUSION:OK glasses combined with atropine of low concentration can improve the uncorrected visual acuity of adolescents with moderate to low myopia, control the increase of diopter and axial length. And there is significant negative influence on corneal morphology and tear film function, and with high safety.