Analysis Of Related Factors Of Dominant Eye Transition After SMILE And Its Effect On Visual Quality

Purpose:To analyze the related factors of the dominant eye transition after Small incision lenticule extraction（SMILE）and to explore the effect of dominant eye transition on visual quality.Methods:A total of 94 patients were included in this retrospective study.All patient were treated with SMILE.According to whether the dominant eye changes,it is divided into conversion group（N=20）and non-conversion group（N=74）.Uncorrected distance visual acuity（UDVA）,modulation transfer function cutoff frequency（MTF cutoff）,objective scatter index（OSI）,Amplitude of accommodation（AMP）,Accommodative Facility（AF）and Visual Quality Questionnaire were measured preoperatively,as well as 1 month and 3 months postoperatively.Logistic binomial regression analysis of factors related to the transition of dominant eye,and a comparison of related parameters of visual quality between groups to explore the effect of dominant eye on visual quality after conversion was also done.Results:1.Comparison of the parameters of the dominant eye between two groups:In the postoperative 1 month,the AMP of the non-conversion group was significantly higher than that of the conversion group（P<0.05）;UDVA,MTF cutoff,OSI,AF were not statistically significant（P>0.05）.2.Comparison of the parameters of the non-dominant eye between the two groups:In the postoperative 1 month analysis,AMP and AF in non-conversion group were significantly higher than conversion group（P<0.05）;There were no statistically significant differences in UCVA,MTF cutoff and OSI.（P>0.05）.3.No difference was found in UDVA,MTF cutoff,OSI,AMP,AF between the two groups after the postoperative 3 month analysis（p>0.05）.4.No difference was found in score of visual quality between non-conversion group and conversion group preoperatively and at1 month and 3 months postoperatively（P>0.05）.5.Comparison of the change of parameters（Δ₁=postoperative 1 month-preoperative;Δ₂=postoperative 3 month-preoperative）between two groups of dominant eyes:UDVA of conversion group improved,MTF cutoff decreased,AMP change range,AF improved,when compared with the non-conversion group was statistically significant（P<0.05）;Δ₁OSI in the two group was not statistically significant（P>0.05）at the end of the postoperative 1 month period.In the postoperative 3 month period,The UCVA of non-conversion group increased significantly more than the conversion group（P<0.05）;Δ₂MTF cutoff,Δ₂OSI,Δ₂AMP,Δ₂AF between two groups was not statistically significant（P>0.05）.6.Comparison of the change of parameters between two groups of non-dominant eyes:The change of AMP in conversion group was smaller than non-conversion group（P<0.05）,and AF increased in conversion group more so than the non-conversion group（P<0.05）,NO difference was found inΔ₁UCVA,Δ₁MTF cutoff andΔ₁OSI（P>0.05）at the end of the postoperative 1 month period.There was no statistically significant differences inΔ₂UCVA,Δ₂MTF cutoff,Δ₂OSI,Δ₂AMP,andΔ₂AF（P>0.05）.7.Comparison of the difference of two eyes between conversion group and non-conversion group:The OSI of conversion group was significantly higher than in the non-conversion group（P<0.05）;UCVA,MTF cutoff,AMP and AF were not statistically significant（P>0.05）at the end of the postoperative 1month period;there was no statistically significant difference in UCVA,MTF cutoff,OSI,AMP,and AF after the 3 months postoperative analysis.8.Regression analysis:Changes in dominant eye AMP,UCVA,and non-dominant eye AF are related factors in the transition of the dominant eye after SMILE.Conclusions:1.The results of this study suggest that some patients will have a dominant eye change after SMILE.2.The changes in AMP,UCVA of dominant eye and AF of non-dominant eye were related factors for the transition of dominant eye after SMILE.3.The decreases of objective visual quality after SMILE may be the related factor of the dominant eye conversion.4.The change of dominant eye has no significant effect on the subjective visual quality of the patients after SMILE.