AIM: To investigate the relationship between the prevalence of peripheral retinal degeneration and myopic degree by using the fort ultra wide angle scanning laser ophthalmoscope(Daytona P200T)for small, early and high middle school period of low, medium and high myopia students peripheral retinal scan.

METHODS: With method of stratified random cluster sampling, to select myopia students in two primary schools, one junior middle school and one senior high school in Mianyang. According to different degrees, the myopia was divided into low, medium and high myopia, with 300 people and 600 eyes respectively. Application of Daytona P200T in natural pupil downward fundus image acquisition, and then the senior ophthalmologist performed the fundus examination under the slit lamp after pupil dilation.

RESULTS: The prevalence of peripheral retinal degeneration was different among different refractive groups, and the higher the myopia, the higher the prevalence of peripheral retinal degeneration(χ²=75.76, P<0.001). Comparison between different degree groups prevalence of peripheral retinal degeneration: frost degeneration(STD)no statistical difference between the three groups(χ²=5.66, P=0.059), lattice degeneration(LD), snail track degeneration(SD), non-oppressive whitening(WWP), cystic degeneration(CD), hiatal(DRP), pigment degeneration(RP)were differences among three groups. For further comparison, except WWP(χ²=9.385, P=0.002), low height both two(P>0.017). Moderately and highly group compared, in addition to the CD(χ²=8.525, P=0.004)and the RP(χ²=6.454, P=0.011), the rest were not tested statistically. Compared with the prevalence of peripheral retinal degeneration in different segments, retinal degeneration was observed in 34 eyes(5.7%)in primary school, 90 eyes(14.9%)in junior middle and 130 eyes(21.9%)in senior high. The prevalence of peripheral retinal degeneration increased with the increase of medical grade(χ²=64.79, P<0.001). The prevalence of WWP and CD showed no statistical difference between junior middle school and primary school and senior high school(P>0.05). For further comparison, except LD(χ²=6.209, P=0.013)and STD(χ²=9.953, P=0.002), no statistical difference in the primary schools and junior middle, junior middle and senior high(P>0.017), statistical difference was detected between the primary schools and senior high school(P<0.017).

CONCLUSION: The prevalence of peripheral retinal degeneration of myopia was positively correlated with myopia and learning period.