Correlation of Variables between the Dominant and Non-dominant Eyes in Healthy Young People

Objective: To investigate the correlation of variables between dominant and non-dominant eyes in healthy young people. Methods: 300 cases(600 eyes) of healthy young volunteers recruited in our hospital from March 2020 to February 2022were selected as the research objects. The general data of the volunteers were collected and the dominant eye, diopter, biological parameters and retinal blood flow density were detected. We compared all the test indexes of volunteers with different dominant eyes, and compared the refractive parameters, biological parameters and retinal blood flow density between the dominant and non-dominant eyes of volunteers. Results: Among the 300volunteers, 62.67%(188/300) had the right eye as the dominant eye and 37.33%(112/300) had the left eye as the dominant eye. There was no significant difference in gender, BMI and equivalent spherical lens(SE) among the subjects with different dominant eyes(P>0.05). The SE and spherical diopter(S) of dominant eye were higher than that of non-dominant eye(P<0.05), but there was no significant difference between the dominant and non-dominant eye(C)(P>0.05); There was no significant difference in SE and C between dominant and non-dominant eye in volunteers with SE difference≤0.5 D and 0.51-1.25 D(P>0.05), and spherical diopter(S) of dominant eye was higher than that of non-dominant eye(P<0.05); The difference of SE was 1.26-2.00 D, >2.00 D, the SE and spherical diopter(S) of dominant eye were higher than those of non-dominant eye(P<0.05), but there was no significant difference between the dominant and non-dominant eye C(P>0.05). The levels of RA and CA in the dominant eye of 300 volunteers were lower than those in the non-dominant eye. The RA and CA levels of the dominant eye were lower than those of the non-dominant eye in volunteers with RA difference ≤0.50 D,0.51-1.25 D, 1.26-2.00 D, >2.00 D(P<0.05). There was no significant difference in the levels of axial length(AL), central corneal thickness(CCT), anterior chamber depth(ACD)and lens thickness(LT) between the dominant and non-dominant eyes(P>0.05). The levels of superficial retinal capillary layer(SVC), deep retinal capillary layer(DVC) and mean retinal blood flow density(RET) in dominant eyes were lower than those in non-dominant eyes. The level of AC in non-dominant eyes was higher than that in non-dominant eyes(P<0.05). Conclusion: The dominant eye of healthy young people is mostly the right eye,which has nothing to do with gender, age and BMI. Meanwhile, the biological parameters between the dominant and non-dominant eye were basically the same, the mean retinal blood flow density of the dominant eye was lower than that of the non-dominant eye, but its AC was higher than that of the non-dominant eye.