Clinical observation of the effects of overnight orthokeratology lens on adolescent myopia

Objective To observe the effects of orthokeratology lens on the corneal curvature,the corneal thickness and the axial length in adolescent myopa.Methods Fifty-six patients(112 eyes,22 males and 34 females,aging from 9 to 15 years old) had been followed up for one year.The average refraction is less then - 6.00D.All the patients wore orthokeratology lens(Boston XO) overnight. The corneal thickness and the corneal curvature were measured by OrbscanⅡZ corneal topography and the axial length were measured by IOL master(Carl Zeiss).Results Compared with the past,the corneal curvature became lower after 3-12 months' wearing and the difference was significant(P0.01);the corneal thickness changed but with no significant difference(P =0.599 2);the axial length became longer after wearing orthokeratology lens for 12 months but without a significant difference (P=0.389 7).Conclusion Wearing overnight orthokeratology lens are effective and safe for the treatment of adolescent myopia.