Department of Ophthalmology, Keio University School of Medicine, Tokyo Dental College, and Department of Ophthalmology, Ichikawa General Hospital, Tokyo, Japan.
Curr Opin Ophthalmol. 2011 Jan;22(1):31-6. doi: 10.1097/ICU.0b013e3283414f36.
Recently, functional visual acuity (FVA) measurement has been reported to be an important method of determining 'masked impairment of visual function' and assessing visual acuity in detail. This review discusses a new continuous FVA measurement system for the assessment of visual performance and introduces the application of FVA measurement in cataract and intraocular lens implantation.
The FVA was first developed to detect impaired visual function for daily activities in dry eye syndrome. The usefulness of this new methodology has been described in patients with tear instability, undergoing laser-assisted in-situ keratomileusis surgery, with Stevens-Johnson syndrome, Sjögren syndrome and mild cataract opacities. The microstructure of the lenticular opacities is highly variable (nucleus sclerosis and/or posterior capsular cataract and/or cortical opacity) causing a combination of different effects on the incident light rays that can be refracted, reflected, absorbed or scattered. In some cases, patients have a good visual acuity but may complain of disturbances in vision quality. We reported the improvement of FVA after cataract surgery in patients with mild cataracts and visual symptomatology despite a good preoperative and postoperative conventional visual acuity. To detect visual impairment due to cataract, measurement of FVA was useful in the evaluation of vision quality and changes in kinetic vision after phacoemulsification surgery.
FVA measurement is an effective and noninvasive test that reflects the complaints of blurring/glare and postoperative satisfaction in patients with mild cataract.
最近，功能视力（FVA）测量已被报道为确定“视觉功能的掩蔽损害”和详细评估视力的重要方法。本综述讨论了一种新的连续 FVA 测量系统，用于评估视觉性能，并介绍了 FVA 测量在白内障和人工晶状体植入中的应用。
FVA 最初是为了检测干眼症综合征中日常活动中受损的视觉功能而开发的。这种新方法的有用性已在泪液不稳定的患者、接受激光辅助原位角膜磨镶术的患者、史蒂文斯-约翰逊综合征、干燥综合征和轻度白内障混浊患者中得到描述。晶状体混浊的微观结构高度可变（核硬化和/或后囊白内障和/或皮质混浊），导致对可折射、反射、吸收或散射的入射光线产生不同的组合影响。在某些情况下，患者视力良好，但可能会抱怨视力质量下降。我们报告了在轻度白内障和视觉症状的患者中，白内障手术后 FVA 的改善，尽管术前和术后常规视力良好。为了检测白内障引起的视力损害，FVA 测量在评估白内障超声乳化术后视觉质量和动态视觉变化方面是有用的。
FVA 测量是一种有效且非侵入性的测试，可反映轻度白内障患者的模糊/眩光主诉和术后满意度。
