Avetisov S E, Myagkov A V, Egorova A V
Research Institute of Eye Disease, 11A Rossolimo St., Moscow, Russian Federation, 119021
I.M. Sechenov First Moscow State Medical University, Department of Ophthalmology, 8-2 Trubetskaya St., Moscow, Russian Federation, 119991
Vestn Oftalmol. 2019;135(1):42-46. doi: 10.17116/oftalma201913501142.
To assess the state of accommodation and the dynamics of changes of ocular axial length in patients with progressive myopia who use bifocal soft contact lenses (BFSCLs).
The main and control groups consisted of 50 children (100 eyes) each. Patients of the main group used BFSCLs with distance-oriented central zone and added power of 4 D on the periphery. Patients of the control group were corrected with spherical soft contact lenses (SSCLs). Baseline measurements included amplitude of accommodation (AA), positive relative accommodation (PRA) and the length of anterior-posterior axis of the eye. All patients were examined before wearing SCLs and every 3 months during the entire period of observation lasting 9 to 12 months.
Correction of myopia with contact lenses is accompanied by the increase of AA and RPA. The users of BFSCLs with distance-oriented central zone and added power of 4 D on the periphery, which induces myopic peripheral defocus, had their accommodative function normalize much faster than the patients wearing SSCLs. The average increase in the ocular axial length in the BFSCLs group appeared to be significantly smaller than in the SSCLs group (0.11 and 0.58 D, respectively), which can be attributed to the simultaneous formation of the central focus and induced peripheral myopic defocus.
评估使用双焦点软性角膜接触镜（BFSCL）的进行性近视患者的调节状态和眼轴长度变化动态。
主要组和对照组各有50名儿童（100只眼）。主要组患者使用中央区以远用为主且周边附加4D屈光度的BFSCL。对照组患者使用球面软性角膜接触镜（SSCL）进行矫正。基线测量包括调节幅度（AA）、正相对调节（PRA）和眼的前后轴长度。所有患者在佩戴软性角膜接触镜前以及在持续9至12个月的整个观察期内每3个月进行一次检查。
使用角膜接触镜矫正近视会伴随AA和RPA的增加。中央区以远用为主且周边附加4D屈光度从而引起近视性周边离焦的BFSCL使用者，其调节功能恢复正常的速度比佩戴SSCL的患者快得多。BFSCL组眼轴长度的平均增加量明显小于SSCL组（分别为0.11D和0.58D），这可归因于中央焦点的同时形成和诱导的周边近视性离焦。
