Definition

Noun: A visual defect characterized by distorted perception, specifically where straight lines are perceived as curved or bent. This condition represents a type of visual distortion affecting spatial judgment.

Usage

The term is a technical medical term used primarily in ophthalmology and optometry to diagnose and describe a specific perceptual anomaly. It is not used in everyday conversation.

Examples

• The patient's complaint of seeing door frames as wavy led to a diagnosis of anorthopia.
• Certain neurological conditions can cause anorthopia, distorting the patient's view of the world.
• The optometrist tested for anorthopia by asking if the lines on the grid chart appeared straight.

Advanced Usage

• Clinical Assessment: Anorthopia is often assessed using an Amsler grid, a tool featuring a grid of straight lines. Patients with this condition will report that the lines appear curved, blurred, or missing.

Variants and Related Words

• Metamorphopsia (noun): A broader term for visual distortion where objects appear misshapen. Anorthopia is a specific form of metamorphopsia.
• Astigmatism (noun): A common refractive error causing blurred vision, but not specifically the curving of straight lines. It is a different condition, though both affect visual clarity.

Synonyms

• Visual distortion
• Perceptual distortion (of lines)

Notes on Meaning

This term refers strictly to the symptom of straight lines appearing curved. It is not a general term for poor eyesight (like myopia or hyperopia) and is distinct from hallucinations, as the patient is seeing a physical object but perceiving its shape incorrectly.

Noun

1. distorted vision in which straight lines appear curved