Lee Hun, Kang David Sung Yong, Reinstein Dan Z, Roberts Cynthia J, Ambrósio Renato, Archer Timothy J, Jean Seung Ki, Kim Eung Kweon, Seo Kyoung Yul, Jun Ikhyun, Kim Tae-Im
J Refract Surg. 2019 Mar 1;35(3):153-160. doi: 10.3928/1081597X-20190205-01.
To evaluate the amount of spherical equivalent correction for three different cap thicknesses (120, 130, and 140 µm) during myopic small incision lenticule extraction (SMILE) and determine the association between the amount of spherical equivalent correction and several variables in each cap thickness group.
In this retrospective, comparative, observational case series study, the authors compared refractive errors, keratometric values, laser setting (sphere correction, cylinder correction, spherical equivalent correction, optical zone, and cap diameter), and spherical aberration measured preoperatively and at 3 months postoperatively between three different cap thickness groups: 120 µm (n = 554), 130 µm (n = 377), and 140 µm (n = 90). Multiple linear regression analyses were used to determine the associations between the amount of spherical equivalent correction and several variables, including age, preoperative spherical equivalent, optical zone diameter, central corneal thickness, preoperative mean keratometric values, and preoperative corneal asphericity.
According to cap thickness, attempted correction is adjusted to achieve the same refractive outcomes for different cap thicknesses. There were significant differences in the amount of sphere correction and spherical equivalent correction, as well as lenticule thickness, among subgroups. Changes in keratometric values, corneal asphericity, and spherical aberration were also significantly different among subgroups (all P < .001). Changes in keratometric values, corneal asphericity, and spherical aberration significantly increased as cap thickness increased. Preoperative spherical equivalent mainly influenced the amount of spherical equivalent correction in each group.
Dioptric adjustment of spherical equivalent correction according to cap thickness is essential to obtain similar refractive outcomes in myopic SMILE procedures. [J Refract Surg. 2019;35(3):153-160.].
评估在近视性小切口透镜切除术（SMILE）中三种不同帽厚度（120、130和140µm）的球镜等效屈光度矫正量，并确定每个帽厚度组中球镜等效屈光度矫正量与几个变量之间的关联。
在这项回顾性、比较性、观察性病例系列研究中，作者比较了三个不同帽厚度组（120µm，n = 554；130µm，n = 377；140µm，n = 90）术前和术后3个月测量的屈光不正、角膜曲率值、激光设置（球镜矫正、柱镜矫正、球镜等效屈光度矫正、光学区和帽直径）以及球差。采用多元线性回归分析来确定球镜等效屈光度矫正量与几个变量之间的关联，这些变量包括年龄、术前球镜等效屈光度、光学区直径、中央角膜厚度、术前平均角膜曲率值和术前角膜非球面性。
根据帽厚度，对不同帽厚度的尝试矫正量进行调整以实现相同的屈光结果。亚组间在球镜矫正量、球镜等效屈光度矫正量以及透镜厚度方面存在显著差异。亚组间角膜曲率值、角膜非球面性和球差的变化也存在显著差异（均P <.001）。随着帽厚度增加，角膜曲率值、角膜非球面性和球差的变化显著增加。术前球镜等效屈光度主要影响每组中的球镜等效屈光度矫正量
在近视性SMILE手术中根据帽厚度进行球镜等效屈光度矫正的屈光度调整对于获得相似的屈光结果至关重要。[《屈光手术杂志》。2019；35(3):153 - 160。]
