Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Equilibrium and Balance

Equilibrium and Balance

The inner ear assumes dual functionalities of auditory perception and equilibrium maintenance. The vestibule is the organ responsible for balance. This organ contains mechanoreceptors, specifically hair cells, endowed with stereocilia, which aid in deciphering information regarding the position and motion of our heads. Two intrinsic components, the utricle and saccule, help perceive head position, while the semicircular canals track head movement. Neurological messages initiated in the...

Dissociative Identity Disorder

Dissociative Identity Disorder

Dissociative Identity Disorder (DID), previously termed multiple personality disorder, is a complex psychological condition characterized by the presence of two or more distinct identities or personality states. Each identity exhibits unique patterns of behavior, voice, and mannerisms and may possess separate memories and emotional responses. The alternating control between identities can result in memory gaps and challenges in recalling daily activities, often exacerbating the individual's...

Dysrhythmias III: Characteristics of Dysrhythmias

Dysrhythmias III: Characteristics of Dysrhythmias

Dysrhythmias, also known as arrhythmias, are irregular heart rhythms that result from abnormal electrical activity in the heart, affecting its ability to circulate blood efficiently. Tachyarrhythmias, a subset of dysrhythmias, are characterized by abnormally fast heart rates exceeding 100 beats per minute. Here are some types of tachyarrhythmias with their distinct ECG features:Sinus Tachycardia:Sinus tachycardia presents a regular heart rhythm with an increased rate of 101-180 beats per minute.

Personality Disorders: Schizotypal and Histrionic

Personality Disorders: Schizotypal and Histrionic

Schizotypal personality disorder and histrionic personality disorder are two distinct psychological conditions classified under personality disorders, each characterized by unique behavioral patterns and social difficulties. Both disorders significantly affect interpersonal relationships and emotional well-being, leading to social isolation and frustration.
Schizotypal Personality Disorder: Eccentric Behavior and Social Withdrawal
Schizotypal personality disorder is marked by odd or eccentric...

Positive Symptoms of Schizophrenia: Hallucinations and Delusions

Positive Symptoms of Schizophrenia: Hallucinations and Delusions

Schizophrenia is a complex mental health disorder that can manifest with various positive symptoms, including thought, movement, and behavior disorders. These symptoms significantly disrupt cognitive and motor functions, leading to profound effects on an individual's ability to engage with the world.
Thought Disorders
Disorganized and unusual thought processes mark thought disorders in schizophrenia. One key feature is disorganized speech, where an individual's conversation includes loosely...

Anxiety: Overview

Anxiety: Overview

Anxiety is a common mental disorder featuring excessive worry, fear, and apprehension, significantly affecting daily life. People with anxiety disorders experience persistent and intense anxiety, interrupting their everyday functioning.
Individuals with anxiety often experience a range of physical and emotional symptoms, including sweating, trembling, tachycardia, and disturbances in sleep patterns. These symptoms vary in intensity and frequency but are generally disruptive and distressing.

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Diagnostic Performance of Prespecified OCT Rules for Glaucomatous Optic Neuropathy in Nonpathologic Myopia.

JAMA ophthalmology·2026

Same author

Changes in tomographic parameters across different wearing and cessation periods of apical clearance-fitted rigid gas-permeable contact lenses in keratoconus.

Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie·2026

Same author

Natural History and Progression of Untreated Keratoconus: An Updated Systematic Review and Meta-Analysis.

Current eye research·2026

Same author

The role of blue light-filtering and premium intraocular lenses on postoperative falls: A nationwide target trial emulation in Taiwan.

Biomedical journal·2025

Same author

Effect of apical clearance rigid corneal contact lens fitting on keratoconus progression: a controlled longitudinal analysis.

Contact lens & anterior eye : the journal of the British Contact Lens Association·2025

Same author

Corneal Tomographic Changes in Keratoconus Associated with Scleral Lens Wear: A Case-Control Analysis for 12-Month Follow-Up.

Medicina (Kaunas, Lithuania)·2025

Search research articles

Related Experiment Video

Updated: Jul 15, 2026

Dynamic Visual Tests to Identify and Quantify Visual Damage and Repair Following Demyelination in Optic Neuritis Patients

Dynamic Visual Tests to Identify and Quantify Visual Damage and Repair Following Demyelination in Optic Neuritis Patients

Published on: April 14, 2014

Functional visual disturbance due to hysteria.

Hui-Chun Lai¹, Ken-Kuo Lin, Meng-Ling Yang

¹Department of Ophthalmology, Chung Gung Memorial Hospital, Taipei, Taiwan, R.O.C.

Chang Gung Medical Journal

|May 5, 2007

Summary

This study details a case of hysterical functional visual disturbance in a young male, characterized by constricted visual fields. Diagnosis was aided by tangent screen examination, highlighting the psychological basis of the visual symptoms.

More Related Videos

Using Eye-tracking to Assess the Relative Importance of Visual and Vestibular Input to Subcortical Motion Processing in the Roll Plane

Using Eye-tracking to Assess the Relative Importance of Visual and Vestibular Input to Subcortical Motion Processing in the Roll Plane

Published on: August 22, 2025

Central and Divided Visual Field Presentation of Emotional Images to Measure Hemispheric Differences in Motivated Attention

Central and Divided Visual Field Presentation of Emotional Images to Measure Hemispheric Differences in Motivated Attention

Published on: November 16, 2017

Related Experiment Videos

Last Updated: Jul 15, 2026

Dynamic Visual Tests to Identify and Quantify Visual Damage and Repair Following Demyelination in Optic Neuritis Patients

Dynamic Visual Tests to Identify and Quantify Visual Damage and Repair Following Demyelination in Optic Neuritis Patients

Published on: April 14, 2014

Using Eye-tracking to Assess the Relative Importance of Visual and Vestibular Input to Subcortical Motion Processing in the Roll Plane

Using Eye-tracking to Assess the Relative Importance of Visual and Vestibular Input to Subcortical Motion Processing in the Roll Plane

Published on: August 22, 2025

Central and Divided Visual Field Presentation of Emotional Images to Measure Hemispheric Differences in Motivated Attention

Central and Divided Visual Field Presentation of Emotional Images to Measure Hemispheric Differences in Motivated Attention

Published on: November 16, 2017

Area of Science:

Ophthalmology
Psychology

Background:

Hysteria, or conversion disorder, presents complex challenges in both psychology and ophthalmology.
Understanding the precise mechanisms and origins of hysterical conditions remains an ongoing area of research.

Observation:

A 23-year-old male presented with a 3-year history of peripheral visual field loss and purple shadows, particularly in the afternoon.
Standard ophthalmological examinations, including visual acuity and ocular assessments, were normal.
Goldmann perimeter and tangent screen tests revealed a bilateral constricted tubular visual field defect within 10 degrees of the center, with steep margins.

Findings:

The patient's history included a 3-month jail term and work-related stress.
The visual symptoms were determined to be a functional disturbance, not indicative of an organic ocular disorder.
Specific visual field patterns, such as constricted tubular, spiral, or star-shaped fields with steep slopes, are characteristic of hysterical conditions.

Implications:

Tangent screen examination is a valuable diagnostic tool for identifying functional visual disturbances.
Ophthalmologists should consider psychogenic factors in patients presenting with unexplained visual symptoms.
Treatment approaches for psychogenic visual disturbances may involve suggestion, patience, and reassurance.