sight

Compared meaning: the ability to see (noun).

比较义项：视力，即看东西的能力（名词）。

• vision

  Vision is the more clinical or technical term for eyesight, common in medical and optical contexts describing visual quality, as in the fixed phrase '20/20 vision'.

  vision 是更偏医学、专业的“视力”说法，常见于描述视觉质量的语境中，尤其是固定搭配“20/20 vision”（视力达到20/20，即正常视力）。

  After the surgery, he finally has 20/20 vision in both eyes.

  手术后，他的双眼视力终于恢复到20/20（正常水平）。

• sight 本词

  Sight is the everyday, general word for the ability to see, and is the natural choice in phrases about blindness or regaining the ability to see, such as 'restore someone's sight'.

  sight 是日常、通用的“视力”说法，在谈论失明或恢复视力的表达中最自然，例如“restore someone's sight”（恢复某人的视力）。

  Doctors were able to restore his sight after years of blindness.

  医生们让他在失明多年后重见光明（恢复了视力）。

Both words can mean eyesight. Vision is more clinical, common in medical contexts describing visual quality, as in '20/20 vision.' Sight is the everyday, general word, used in phrases about blindness or getting back the ability to see.

这两个词都可以指“视力”，但语域和搭配不同：vision 更偏医学、专业语境，常与具体数值或清晰度搭配（如“20/20 vision”视力达标）；sight 是日常更通用的说法，尤其常见于谈论失明或恢复视力的表达中。这里不比较 vision 的另一义项“远见、构想”（如商业愿景），也不比较 sight 的另一义项“景象、看到的画面”。