Peripheral Refraction in Myopic Patients After Orthokeratology
Peripheral Refraction in Myopic Patients After Orthokeratology
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DOI：
10.1097/opx.0b013e3181d951f7
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发表时间：
2010-05-01
影响因子：
1.4
通讯作者：
Gutierrez, Angel R.
中科院分区：
文献类型：
--
作者：
Queiros, Antonio;Manuel Gonzalez-Meijome, Jose;Gutierrez, Angel R.
目的.本研究的目的是描述近视角膜屈光治疗（CRT）前后角膜水平子午线上的中心和周边屈光的特征。来自28名受试者（平均年龄+/- SD = 24.6 +/- 6.3岁）的28只右眼配戴Paragon CRT角膜接触镜，以治疗等效球镜-0.88至-5.25 D之间的近视。沿着一套完整的检查程序，以评估治疗的适用性，测量中心和周边屈光度沿水平子午线沿着到35度偏心率在鼻侧和颞侧视网膜区域的5个步骤。通过主观验光测量的基线中心平均等效球镜（M）从-1.95 +/- 1.27 D变为-0.38 +/- 0.67 D。颞侧视网膜中M成分的变化范围为中心1.42 +/- 0.89 D和20度0.43 +/- 0.88 D（p < 0.002）。在中心屈光度两侧25度处测量，治疗后的周边屈光度与基线值无统计学差异（p > 0.351）。超过25度限制，M分量在近视方向上改变，在35度时颞侧视网膜中高达-1.11 +/-0.88D（p < 0.001）。治疗诱导的鼻侧和颞侧视野沿水平子午线沿着对称（所有偏心率p > 0.05）。30 °（r（2）= 0.573，p < 0.001）和35 °（r（2）= 0.645，p < 0.001）偏心屈光度的近视眼等效球镜增加程度与基线时的轴向等效球镜高度相关。CRT在等效球镜屈光中反转周边屈光模式，在中心25度视野内创建近视减少的治疗区域，以及超过25度的近视移位。在30度和35度的周边屈光中，根据等效球镜引起的近视量与待矫正的基线等效球镜屈光量具有几乎1：1的关系。（Optom维斯科学2010; 87：323-329）
Purpose. The purpose of this study was to characterize the central and peripheral refraction across the horizontal meridian of the visual field before and after myopic corneal refractive therapy (CRT) with contact lenses.Methods. Twenty-eight right eyes from 28 subjects (mean age +/- SD = 24.6 +/- 6.3 years) were fitted with Paragon CRT contact lenses to treat myopia between -0.88 and -5.25 D of spherical equivalent. Along with a complete set of examination procedures to assess suitability for treatment, the central and peripheral refractions were measured along the horizontal meridian up to 35 degrees of eccentricity in the nasal and temporal retinal area in 5 steps.Results. Baseline central average spherical equivalent (M) measured by subjective refraction changed from -1.95 +/- 1.27 D to -0.38 +/- 0.67 D. Changes in M component ranged between 1.42 +/- 0.89 D at center and 0.43 +/- 0.88 D at 20 degrees in the temporal retina (p < 0.002). At 25 degrees to both sides of the central refraction measurement, peripheral refraction after treatment was not statistically different from baseline values (p > 0.351). Beyond the 25 limit, M component changed in the myopic direction up to -1.11 +/- 0.88 D at 35 degrees in temporal retina (p < 0.001). Treatment induced was symmetric between nasal and temporal visual field along the horizontal meridian (p > 0.05 for all eccentricities). Furthermore, the degree of myopic increase in spherical equivalent for 30 degrees (r(2) = 0.573, p < 0.001) and 35 degrees (r(2) = 0.645, p < 0.001) eccentric refraction was highly correlated with axial spherical equivalent at baseline.Conclusions. CRT inverts the pattern of peripheral refraction in spherical equivalent refraction, creating a treatment area of myopic reduction within the central 25 degrees of visual field, and a myopic shift beyond the 25 degrees. In peripheral refraction for 30 degrees and 35 degrees, the amount of myopia induced in terms of spherical equivalent has an almost 1:1 relationship with the amount of baseline spherical equivalent refraction to be corrected. (Optom Vis Sci 2010; 87: 323-329)