目的 研究单眼视法配戴角膜接触镜(monovision contact lens,MV-CL)后老视患者远、近视力的变化,暗视/明视下对比敏感度(contrast sensitivity,CS)的变化以及眩光刺激对CS的影响。方法 对35例有老视症状者1眼配戴远视用角膜接触镜以改善近视力,其中12例伴轻度远视者另一眼同时配戴接触镜以提高远视力,并分别于戴镜前、戴镜后1个月测量远近视力;对比CS和眩光刺激下的CS,并进行统计学分析。结果 MV-CL后,89%的患者双眼裸眼远视力达0.8,近视力达0.33(J4)或更好,戴镜前仅有6%的人达到此视力。双眼明视下,在3.0、12及18 cpd处CS的下降明显(P<0.05),双眼暗视下,在1.5、12.0及18.0 cpd处CS的下降差异有统计学意义(P<0.05)。双眼明视下眩光造成的影响在3.0,12.0及18.0 cpd处明显(P<0.05),在其他空间频率处差异无统计学意义(P＞0.05)。暗视有眩光下,对比敏感度函数的降低更明显,在6.0及18.0 cpd处最显著 (P<0.05)。结论 MV-CL能明显提高近视力,有效缓解老视症状。MV-CL者的CS在高空间频率段下降明显,表现为暗视下的影响显著。眩光刺激降低了MV-CL者的CS,主要集中在中、高频率段。
Abstract
Objective To investigate the change of distance/near vision, contrast sensitivity (CS) and the effect of glare on CS after MV-CL under mesopic and photopic conditions. Methods One eye of 35 patients weared contact lenses to improve near vision, the other eye of 12 patients with hyperopia weared contact lenses to improve distant vision. Besides, CS under the photopic and mesopic conditions was tested and the influence of glare on CS was assessed before and a month after wearing lenses; eventually these data were analyzed statistically. Results There were 89% of the patients whose naked vision was 0.8/0.33(J4) after MV-CL, and only 6% of the patients whose measured naked vision was 0.8/0.33(J4). In the photopic conditions of MV-CL, the average value of CS had a descending tendency, and especially there were statistical significance in 3.0, 12 and 18 cpd(P<0.05), so were in the mesopic conditions of MV-CL and there were statistical significance in 1.5,12 and 18 cpd(P<0.05). In the photopic conditions of MV-LV,the effect of glare on CS was obvious in 3.0,12 and 18 cpd and there were statistical significances between the two groups(P<0.05); so were in the mesopic conditions of MV-LV and there were statistical significances in 6.0 and 18 cpd(P<0.05). Conclusions Near vision can be obviously increased and presbytism can be relieved by MV-CL. The value of CS by MV-LV decreases obviously in high frequency transduction, and is effected in the mesopic conditions.Glare stimulates and decreases CS obviously in middle and high frequency.
关键词
单眼视 /
接触镜 /
老视 /
对比敏感度
Key words
monovision /
contact lens /
presbyopia /
contrast sensitivity
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[1] Erickson P, Mcgill E C.Role of visual acuity,stereoacuity and ocular dominance in monovision patient success[J].Optom Vis Sci,1992,69(10):761-764.[2] Schor C,Landsman L,Erickson P.Ocular dominance and the interocular suppression of blur in monovision[J].Am J Optom Physiol Opt,1987,64(10):723-730.
[3] Sheedy J E,Harris M G,Gan C M.Does the presbyopic visual system adapt to contact lenses？[J].OptomVis Sci,1993,70(6):482-486.
[4] Back A,Grant,Hine N.Comparative visual performance of three presbyopiccontact lens corrections [J].OptomVis Sci,1992,69(6):474-480.
[5] Wood J M,Wick K,Shuley V,et al.The effect of monovision contact lens wear on driving performance[J].Clin Exp Optom,1998,81(3):100-103.
[6] Pardhan S,Gilchrist J.The effect of monocular defocus on binocular contrast sensitivity[J].Ophthalmic Physiol Opt,1990,10(1):33-36.
[7] Collins M J,Brown B,Bowman K J.Contrast sensitivity with contact lens corrections for presbyopia[J].Ophtomhalmic Physiol Opt,1989,9(2):133-138.
[8] 艾立坤,成娟娟,李东辉,等.软性角膜接触镜与透气性硬性角膜接触镜对像差的影响[J].眼科,2005,14(5):295-299.
[9] De Wit G C,Coppens J E.Stray light of spectacle lenses compared with stray light in the eye[J].Optom Vis Sci,2003,80(5):395-400.
[10] Vos J J.On the cause of disability glare and its dependence on glare angle,age and ocular pigmentation[J].Clin Exp,2003,86(6):363-370.
[11] Van den Berg T J.On the relation between glare and straylight[J].Doc Ophthalmol,1991,78(3):177-181.
PDF(677 KB)
