Abstract
Objective To investigate the peripheral defocus status of myopic patients,the correlation between equivalent spherical power,axial length,and peripheral defocus status of the retina,and whether there is a difference in the rate of axial growth of the retina before wearing customized defocus lenses for one year.Methods Retrospective study.By consulting the hospital's electronic medical record system,51 patients who underwent customized defocusing lens fit-ting in our hospital from January 2023 to September were collected.Relevant information including age,gender,refractive power,lens type,etc.was extracted.All subjects'right eye data were collected for statistical analysis(a total of 51 eyes).According to the changes in eye axis,they were divided into a fast growth group(annual growth≥0.2 mm)of 37 cases(a to-tal of 37 eyes)and a slow growth group(annual growth<0.2 mm)of 14 cases(a total of 14 eyes),with the main indicators including eye axis length;Multispectral Refractive Topography(MRT)measures retinal defocus,with positive values indi-cating farsightedness and negative values indicating nearsightedness.Taking the macular fovea as the center,the total defo-cus amount of the retina is recorded as TRDV,the defocus amount within 15° of the retina is recorded as RDV-15°,the de-focus amount within 30 ° of the retina is recorded as RDV-30°,the defocus amount within 45° of the retina is recorded as RDV-45°,the defocus amount above the retina is recorded as RDV-S,the defocus amount below the retina is recorded as RDV-I,the defocus amount on the temporal side of the retina is recorded as RDV-T,and the defocus amount on the nasal side of the retina is recorded as RDV-N.Differences in defocus amount in different regions of the growth rate group.Results(1)RDV-15°and RDV-30°show myopic defocus,RDV-45°shows hyperopic defocus,RDV-S shows myopic defo-cus,RDV-I,RDV-T,and RDV-N show hyperopic defocus.(2)TRDV,RDV-30°,RDV-45°,RDV-S,RDV-T,and RDV-N are negatively correlated with SER and positively correlated with AL(all P<0.05),while RDV-15°and RDV-I are not correlated with SER or AL(P>0.05).(3)There was no statistically significant difference in the defocus status of the retina between the two groups of patients(P>0.05).Conclusions(1)The relative defocus around the retina of myopic patients increases with the increase of distance from the macular center,and the retinal defocus is asymmetric.RDV-15°and RDV-30°show myopic defocus,RDV-45°shows hyperopic defocus,RDV-S shows myopic defocus,and RDV-I,RDV-T,and RDV-N show hyperopic defocus.(2)TRDV,RDV-30,RDV-45°,RDV-S,RDV-T,and RDV-N are negatively correlated with SER and positively correlated with AL,while RDV-15°and RDV-I are not related to SER or AL.(3)The defocused state of the retina before wearing customized defocused frame glasses may not be correlated with rapid axial progression.关键词
近视/离焦框架眼镜/视网膜离焦Key words
Myopia/Defocus frame glasses/Retinal defocus
