optical

optical — adjective

1. connected with sight, or with the way light affects what we see

1.形容詞C1
釋義

connected with sight, or with the way light affects what we see

例句

At the fair, Ben watched an optical illusion spin across the wall.

collocation: optical illusion

Bright paint on the steps creates a strong optical effect.

collocation: optical effect

同義詞
  • visual

    is the most common everyday word, especially for appearance or images

  • ocular

    is more formal and usually refers specifically to the eyes

  • light-based

    stresses the use of light more than the act of seeing

反義詞
  • nonvisual

    describes information or activity that does not depend on sight

文法句型

optical illusion

optical effect

optical signal

用法筆記

This is the broad sense for sight and light in general. Distinguish it from adjective/2, which is about tools that help you see better, and adjective/3, which is mainly about reading or storing data with light.

常見錯誤

❌The poster has a very optical look.
✅The poster has a very visual look.
💡for general appearance, visual is more natural; optical usually relates to sight or light.
❌The lesson was about opticals.
✅The lesson was about optics.' / 'The lesson was about optical effects.
💡optical is usually an adjective, not a plural noun.

2. describing a tool or part that makes details easier for the eyes to pick out

2.形容詞C1
釋義

describing a tool or part that makes details easier for the eyes to pick out

例句

After the eye test, the nurse recommended an optical aid for reading.

collocation: optical aid

An optical lens made the tiny print on the bottle clear.

collocation: optical lens

同義詞
  • corrective

    is mainly used for lenses that improve weak eyesight

  • magnifying

    is narrower and stresses making small detail look larger

  • viewing

    appears in product names for equipment used to look at something

文法句型

optical aid

optical lens

optical attachment

用法筆記

Usually found in product or medical language for lenses, aids, and instruments. Unlike adjective/1, this sense points to something used for clearer seeing, not to sight or light in a general way.

常見錯誤

❌I need an optical to read this label.
✅I need an optical aid to read this label.
💡optical normally needs a noun after it.
❌These glasses are very visual.
✅These glasses are a useful optical aid.
💡visual describes what is seen, not a device for seeing better.

3. using light to read, take in, or store information for a machine

3.形容詞C2
釋義

using light to read, take in, or store information for a machine

例句

The lab stores old photos on an optical disc.

collocation: optical disc

Our printer has an optical scanner for copying paper forms.

collocation: optical scanner

同義詞
  • light-based

    stresses the method of using light, not the specific machine task

  • laser-based

    is narrower and suggests a laser is doing the reading or scanning

  • photoelectric

    is more technical and often focuses on the sensor itself

反義詞
  • magnetic

    describes storage or reading systems that use magnetism instead of light

文法句型

optical disc

optical scanner

optical storage

用法筆記

This sense is mostly technical and appears with words such as disc, scanner, sensor, and storage. Distinguish it from adjective/2, which is about helping human eyesight rather than processing data.

常見錯誤

❌The office saved the files on a visual disc.
✅The office saved the files on an optical disc.
💡use optical for technology that reads data with light.