ABSTRACT
Objective: A rising trend in electronic use has increased the prevalence of myopia in adolescents, but the optimal approach to controlling myopia remains undetermined. Here, we explored the effects of common single vision (SV) spectacle lenses combined with 0.01% atropine eye drops (SV + A), orthokeratology (OK) lenses, and peripheral defocus (PD) spectacle lenses on myopia control in adolescents. Methods: Totally 150 myopic adolescent patients (300 eyes) receiving treatment at The First People's Hospital of Chenzhou City were enrolled. According to doctors' advice and guardians' wishes, the patients were divided into SV + A group, OK group, and PD group, with each group consisting of 50 cases (100 eyes). The spherical equivalent, axial length, accommodative response index (accommodative sensitivity and accommodative lag), and intraocular pressure were compared before and after 12 months of wearing lenses, and the complications were recorded. Results: Before wearing lenses, there was no statistical significance in baseline characteristics such as age, gender, and spherical equivalent among the three groups (P > 0.05). After wearing lenses, the increase in spherical equivalent and axial length in the SV + A and OK groups were lower than in the PD group (P < 0.05), and the SV + A group had the lowest axial length growth. Compared with the SV + A group, accommodative sensitivity was much higher and accommodative lag was significantly lower in the OK and PD groups (P < 0.01). In addition, there was no significant difference in intraocular pressure before and after wearing lenses among the three groups (P > 0.05). Though the OK group patients had more complications, the difference was not statistically significant (P > 0.05). Conclusion: SV + A, OK, and PD lenses can effectively control the progression of myopia in adolescents, but SV + A and OK lenses exhibited more significant effects.
ABSTRACT
AIM:To observe the clinical efficacy after LASIK with corneal flap created by femtosecond laser and microkeratome.METHODS:The ophthalmic myopia patients after LASIK with corneal flap created by femtosecond laser or microkeratome in our hospital,50 cases (100 eyes) each,were inspected for uncorrected vision,residual diopter,dry eyes survey,higher order aberrations at 1,3 and 6mo after surgeries.RESULTS:There were no statistical differences between two groups of uncorrected vision and residual diopter in 6mo after surgery (P＞ 0.05).The incidence of dry eye comparison for postoperative 1 and 3mo were significantly different (P ＜ 0.05),but there were no statistical differences for postoperative 6mo (P＞0.05).The higher order aberrations of the two groups increased after surgery,the differences were significant compared with preoperative(P＜0.05).At 1mo after surgeries,horizontal coma aberration,vertical coma aberration and spherical aberration were not significantly different (P＞0.05).At 3 and 6mo after surgeries,horizontal coma aberration and vertical coma aberration were not significantly different (P＞0.05).And the change of spherical aberration after LASIK with corneal flap created by femtosecond laser was less than that with microkeratome (P＜0.05).CONCLUSION:LASIK with corneal flap created by femtosecond laser is a safe,effective and stable surgical approach.The incidence of dry eye is low;the postoperative visual quality is better than LASIK with corneal flap created by microkeratome.