annular scotoma

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Word: Annular Scotoma

Part of Speech: Noun

Definition: An annular scotoma is a type of vision problem where there is a circular area in a person's field of vision that is either blurry or completely missing. This circular area surrounds the center of what a person can see.

Usage Instructions:

• Context: This term is often used in medical or optical contexts, especially when discussing eye health.
• When to use: You would use "annular scotoma" when talking about specific visual impairments or conditions affecting the eyes.

Example:

• "The doctor explained that the patient had an annular scotoma, which made it difficult for him to see objects directly in front of him."

Advanced Usage:

• In advanced discussions, you might encounter this term in research papers about vision disorders or when describing certain diseases that affect the eye, such as glaucoma or macular degeneration.

Word Variants:

• Scotoma: This is the general term for any area of reduced vision. "Annular" describes the specific shape of the scotoma.
• Annular: This adjective means "ring-shaped."

Different Meanings:

• "Scotoma" alone can refer to other types of vision loss that are not necessarily circular.

Synonyms:

• There are no direct synonyms for "annular scotoma," but related terms include:
  • Visual field defect
  • Blind spot (though a blind spot can refer to a different type of vision loss)

Idioms and Phrasal Verbs:

• There are no idioms or phrasal verbs specifically related to "annular scotoma," as it is a technical term.

Summary:

"Annular scotoma" is a specific medical term relating to a circular area of vision loss. It's important in discussions about eye health and can be found in medical literature.

Academic

Noun

1. a circular scotoma surrounding the center of the field of vision