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Allergic Reactions: Anaphylaxis01:30

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Anaphylaxis is a severe, life-threatening hypersensitivity reaction mediated by Immunoglobulin E (IgE) antibodies. When IgE binds to allergens, it triggers the release of mediators– histamine, leukotrienes, and prostaglandins from mast cells and basophils. These mediators cause vasodilation, edema, and inflammation, leading to various symptoms.The primary allergens causing anaphylaxis include food items (e.g., peanuts, shellfish), drugs (e.g., penicillin, asparaginase, corticotropin,...
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Drug-related allergies are immune-mediated responses triggered by the administration of pharmacological agents. These hypersensitivity reactions are classified based on the immune mechanisms involved. The four primary types—Type I, II, III, and IV—are mediated by different immunological pathways and exhibit distinct clinical manifestations.Type I Hypersensitivity/ IgE-Mediated Reactions: Immunoglobulin E (IgE) immediately mediates Type I hypersensitivity reactions. Upon initial...
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At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category,...
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Related Experiment Video

Updated: Apr 29, 2026

A Chronic Autoimmune Dry Eye Rat Model with Increase in Effector Memory T Cells in Eyeball Tissue
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Allergic eye disease.

Virginia Miraldi Utz1, Aaron R Kaufman2

  • 1Abrahamson Eye Institute, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA; Department of Ophthalmology, University of Cincinnati, Cincinnati, OH 45229, USA.

Pediatric Clinics of North America
|May 24, 2014
PubMed
Summary
This summary is machine-generated.

Ocular allergy, common in children, presents with itchy, red eyes. New treatments offer improved efficacy and safety for managing this allergic eye condition.

Keywords:
AllergyAtopicConjunctivitisPerennialSeasonalVernal

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Area of Science:

  • Ophthalmology
  • Allergology
  • Pediatrics

Background:

  • Ocular allergy is a prevalent condition affecting children, frequently linked to atopy.
  • Itching is the primary symptom, with bilateral eye redness also common.
  • Understanding immunologic mechanisms aids in diagnosis and treatment.

Purpose of the Study:

  • To review the classification, diagnosis, and management of ocular allergy.
  • To highlight clinical indicators of severe allergic eye disease.
  • To guide timely referral to ophthalmology when necessary.

Main Methods:

  • Review of basic and clinical research on ocular allergy.
  • Discussion of immunologic mechanisms and clinical presentations.
  • Analysis of pharmacologic management strategies and new agents.

Main Results:

  • Newer pharmacologic agents enhance treatment efficacy and safety.
  • Identifying severe allergic disease signs is crucial for management.
  • Differential diagnosis is essential for appropriate care.

Conclusions:

  • Effective management of ocular allergy involves accurate diagnosis and appropriate treatment.
  • Prompt ophthalmologist referral is indicated for severe or complex cases.
  • Advances in pharmacotherapy have improved ocular allergy outcomes.