Silva-Leite Sara, Amorim-de-Sousa Ana, Queirós António, González-Méijome José Manuel, Fernandes Paulo
Clinical & Experimental Optometry Research Lab (CEORLab), School of Sciences, University of Minho, 4710-057 Braga, Portugal.
Physics Center of Minho and Porto Universities (CF-UM-UP), 4710-057 Braga, Portugal.
J Clin Med. 2023 Feb 10;12(4):1435. doi: 10.3390/jcm12041435.
This study aimed to evaluate the peripheral defocus induced with a novel perifocal ophthalmic lens for myopia progression control and the potential impact on visual function. This experimental, non-dispensing crossover study evaluated 17 myopic young adults. The peripheral refraction was measured using an open-field autorefractor, at 2.50 m from the target point, in two eccentric points, 25° temporal, 25° nasal, and central vision. Visual contrast sensitivity (VCS) was measured at 3.00 m with a Vistech system VCTS 6500 in low light conditions. Light disturbance (LD) was assessed with a light distortion analyzer 2.00 m away from the device. Peripheral refraction, VCS, and LD were assessed with a monofocal lens and perifocal lens (with an add power of +2.50 D on the temporal side of the lens, and +2.00 D on the nasal side). The results showed that the perifocal lenses induced an average myopic defocus of -0.42 ± 0.38 D (-value < 0.001) in the nasal retina, at 25° The changes induced by the lower add power in the nasal part of the lens did not induce statistically significant changes in the refraction of the temporal retina. The VCS and LD showed no significant differences between the monofocal and perifocal lenses.
本研究旨在评估一种新型周边聚焦眼镜片诱导的周边离焦对近视进展控制的作用以及对视觉功能的潜在影响。这项实验性、非配药交叉研究评估了17名近视青年。使用开放式自动验光仪在距目标点2.50米处，于两个偏心点（颞侧25°、鼻侧25°）及中心视力处测量周边屈光。在低光照条件下，使用Vistech系统VCTS 6500在3.00米处测量视觉对比敏感度（VCS）。使用光畸变分析仪在距设备2.00米处评估光干扰（LD）。分别使用单焦点镜片和周边聚焦镜片（镜片颞侧附加光度为+2.50 D，鼻侧附加光度为+2.00 D）评估周边屈光、VCS和LD。结果显示，周边聚焦镜片在鼻侧视网膜25°处诱导了平均-0.42±0.38 D的近视性离焦（P值<0.001）。镜片鼻侧较低附加光度引起的变化未在颞侧视网膜屈光上引起统计学显著变化。单焦点镜片和周边聚焦镜片之间的VCS和LD无显著差异。
