Optometry Research Group, Department of Optics and Optometry and Vision Sciences, University of Valencia, Valencia, Spain.
Clinical and Experimental Optometry Research Laboratory (CEORLab), Center of Physics (Optometry), School of Sciences, University of Minho, Braga, Portugal.
Ophthalmic Physiol Opt. 2020 Nov;40(6):718-727. doi: 10.1111/opo.12729. Epub 2020 Sep 4.
To compare the optical and visual performance of a dual-focus (DF) contact lens used for myopia control with a single-vision (SV) contact lens of the same material.
A randomised, double-masked crossover study. Twenty-eight healthy, myopic volunteers between 18 and 32 years of age (23.49 ± 4.07 years) participated in this study. The sensory dominant eye for distance vision was determined. Refraction, best-corrected visual acuity (VA) and aberrations for 3 mm and 5 mm pupil diameters were quantified without a contact lens in situ. Subjects were fitted with two contact lens designs: DF and SV, both made of omafilcon A material. The Quality of Vision (QoV) questionnaire, over-refraction, best-corrected VA, stereopsis at 40 cm, best-corrected photopic and mesopic contrast sensitivity, light disturbance and aberrations were assessed 25 min after contact lens insertion.
There were no statistically significant differences in best-corrected VA and stereopsis between the baseline, DF and SV conditions. Photopic and mesopic contrast sensitivity were lower for the DF contact lens at all frequencies, with the exception of the mesopic contrast sensitivity at 18 cycles per degree (p = 0.23). Higher order aberrations and light disturbance size and irregularity were higher for the DF contact lens (p < 0.001). No differences were found in higher order aberrations between baseline and the SV contact lens condition for each pupil diameter. QoV scores also revealed lower frequency, severity and bothersome scores with the SV contact lens than with the DF contact lens (p < 0.001).
The DF contact lens design decreased the psychophysical and psychometric visual quality scores in the short-term under dim-light conditions when compared with a single-vision contact lens design of the same material. VA and stereopsis were unaffected by the lens design.
比较用于近视控制的双焦点（DF）接触镜与相同材料的单视（SV）接触镜的光学和视觉性能。
一项随机、双盲交叉研究。 28 名 18 至 32 岁（23.49 ± 4.07 岁）的健康近视志愿者参与了这项研究。确定了用于远距离视觉的感觉优势眼。在没有接触镜在位的情况下，定量测量 3mm 和 5mm 瞳孔直径的屈光度、最佳矫正视力（VA）和像差。为受试者配备了两种接触镜设计：DF 和 SV，均由 omafilcon A 材料制成。在接触镜插入后 25 分钟，使用视觉质量（QoV）问卷、过矫、最佳矫正 VA、40cm 立体视、最佳矫正明视和中视对比度敏感度、光干扰和像差进行评估。
在基线、DF 和 SV 条件下，最佳矫正 VA 和立体视之间没有统计学上的显著差异。在所有频率下，DF 接触镜的明视和中视对比度敏感度均较低，但 18 周/度的中视对比度敏感度除外（p = 0.23）。DF 接触镜的高阶像差和光干扰大小及不规则性更高（p < 0.001）。在每个瞳孔直径下，SV 接触镜的基线与 SV 接触镜条件之间的高阶像差没有差异。QoV 评分也显示，与 DF 接触镜相比，SV 接触镜在低光照条件下具有较低的频率、严重程度和困扰评分（p < 0.001）。
与相同材料的单视接触镜设计相比，DF 接触镜设计在短时间内在低光照条件下降低了心理物理和心理测量视觉质量评分。VA 和立体视不受镜片设计的影响。
