Visual acuity - Wikipedia
网页Visual acuity (VA) commonly refers to the clarity of vision, but technically rates an animal's ability to recognize small details with precision. Visual acuity depends on optical and neural factors. Optical factors of the eye influence the sharpness of an image on its retina. Neural factors include the health and functioning of the retina, of ...
Visual Acuity Score: Tests, Charts & Scores Explained - Vision Center
网页2024年5月1日 · A visual acuity test will help assess your visual function and diagnose common vision problems, such as refractive errors. It’s a key part of a comprehensive eye exam. Children frequently get their visual acuity tested to detect potential vision problems early on, while they’re easiest to treat.
视敏度 - 百度百科
网页视敏度（visual acuity）是指眼分辨物体细微结构的最大能力。. 通常用能分辨两点的最小视角来确定。. 视角是物体上两点光线射入眼球，在晶状体光心前交叉所形成的夹角。. 正常眼能分辨两点的最小视角约为 1 分角（圆周为360度，1分角即为 1/60度）。. 在最合适 ...
Visual Acuity - American Academy of Ophthalmology
网页2022年1月20日 · What is visual acuity? Visual acuity measures how sharp your vision is at a distance. It is usually tested by reading an eye chart. How is visual acuity tested? The Snellen eye chart, with its familiar rows of letters in decreasing sizes, is the most common visual acuity test. While standing or sitting 20 feet from the chart, you are instructed ...
20/20 Vision: What Is Visual Acuity, How It's Tested, and More - WebMD
网页2023年7月10日 · Acuity of vision is a term used to describe the clearness or sharpness of your vision when measured at a distance of 20 feet. Visual acuity is the most common clinical measurement of how your...
Visual Acuity: Meaning, Tests & Scores Explained - MyVision.org
网页2022年3月1日 · Visual acuity is the ability of your eyes to distinguish between objects that you see when standing at a specific distance. It is also called visual sharpness, or clarity of vision. Acuity is the first thing eye doctors assess when examining a patient because it gives a baseline of the person’s eyesight. Someone with normal visual acuity is ...
Visual Acuity Test: Types, Procedure & Interpreting Results
网页A visual acuity test is a test that checks your vision. Your “visual acuity” is the medical term for how well you can see. You’ve experienced a visual acuity test if you’ve ever looked at a wall chart of letters or symbols during an eye exam or in your healthcare provider’s office.
Evaluation of Visual Acuity - StatPearls - NCBI Bookshelf
网页2024年5月1日 · Visual acuity is the clarity or sharpness of vision. Visual acuity assessment is a crucial aspect of ophthalmic examination. The loss of visual acuity can significantly impact an individual's quality of life. Vision loss may be due to ocular disease, systemic disease, or diseases of other organ …
视觉锐度 - 百度百科
网页视觉锐度（visual acuity） 又叫视力指可辨识目标物清晰度之一种测量视觉能力。 眼睛辨别两个相邻点的能力称为视锐度。 视锐度取决于几个因素，但主要是光感受器在视网膜上的分布和眼睛折射的精度。 眼睛分辨景物细节的能力有一极限值，若以人眼对被观察物体相邻最近两点的最小视角为θ来表示，则视力定义为该θ的倒数。
視力 - 维基百科，自由的百科全书
网页視力 （visual acuity，VA）是指 视觉 的灵敏度及清晰度，主要取决于 眼睛 视网膜 中心对视觉图像的敏锐程度和大脑中 视皮层 对图像的解析能力 [1]。 参见. 角分辨率. 斯內倫視力表 （英语：snellen chart） （又稱為斯耐倫視力表、史奈侖視力檢查表、施氏視力表、驗眼圖、標準視力測驗圖形） [2][3] 视觉. 折光度. 視力測試. 眼科检查 （英语：eye exam） 近视. 参考文献. ^ Cline D; Hofstetter HW; Griffin JR. Dictionary of Visual Science. 4th ed. …