方法：横断面研究。50例患者(50眼)接受全面的眼科检查，包括屈光度、裸眼视力(UCVA)、最佳矫正视力(BCVA)、裂隙灯显微镜及眼底检查、泪膜破裂时间(BUT)、角膜地形图和对比敏感度。戴镜后，测量最佳戴镜矫正视力(BCLCVA)、对比敏感度及舒适度通过平均视觉模拟量(VAS)呈现。

结果：患者平均年龄为26.2±6.0(16～39)y。使用Rose K2软性角膜接触镜UCVA， BCVA， 和 BCLCVA的平均logMAR值依次为0.61±0.37(0.15～1.3)， 0.42±0.32(0～1.3)和 0.18±0.20(0～1.3)。使用接触镜后视敏度显著提高(P<0.05)，在明视和暗视条件下，对比敏感度数值明显增加(P<0.05)。Rose K2软性角膜接触镜的视觉模拟量(VAS)值为8.02±1.64(5～10)。

结论：圆锥角膜患者使用Rose K2软性角膜接触镜能够改善视力，对比敏感度以及舒适度。

METHODS: Fifty eyes of 50 participants were included in this cross-sectional study. Each participant received a full ophthalmologic examination involving refraction, uncorrected visual acuity(UCVA), best spectacle corrected visual acuity(BCVA), slit-lamp biomicroscopy-fundoscopy, break-up time(BUT), corneal topography, and contrast sensitivity. After contact lens was fitted best contact lens corrected visual acuity(BCLCVA), contrast sensitivity, and comfort rating via visual analogue scales(VAS)were performed.

RESULTS: The mean age was 26.2±6.0(range: 16 to 39)y. The mean logMAR UCVA, BCVA, and BCLCVA with Rose K2 soft(in order)were 0.61±0.37(range: 0.15-1.3), 0.42±0.32(range: 0-1.3), and 0.18±0.20(range: 0-1.3). There were significant increases in visual acuities with contact lenses(P < 0.05). The mean contrast sensitivity scores were significantly better with both contact lens in mesopic and photopic conditions(P <0.05). The mean VAS score was 8.02±1.64(range: 5-10)for Rose K2 soft.

CONCLUSION: Rose K2 soft contact lens can improve visual acuity, contrast sensitivity with comfort in patients with keratoconus.