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The vascular phase, also known as vasospasm, is the initial stage of hemostasis, crucial for preventing excessive bleeding when a blood vessel is injured. After a vessel is cut, nerves in the damaged area trigger pain and other sensory impulses. Simultaneously, the smooth muscles in the vessel wall contract, resulting in a vascular spasm. This contraction reduces the vessel's diameter at the injury site, slowing or stopping blood loss through the vessel wall. Vascular spasms typically last...
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Spasmolytic agents are drugs used to alleviate muscle spasms and spasticity. They can be categorized into different chemical groups based on their mechanisms of action. Centrally acting spasmolytics primarily affect the spinal cord, while others directly target skeletal muscle cells.
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Related Experiment Video

Updated: May 2, 2026

Simulating the Mechanics of Lens Accommodation via a Manual Lens Stretcher
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[Spasm of accommodation].

Laura Lindberg1

  • 1Silmätautien erikoislääkäri HYKS:n silmätautien klinikka.

Duodecim; Laaketieteellinen Aikakauskirja
|March 11, 2014
PubMed
Summary
This summary is machine-generated.

Spasm of accommodation is prolonged ciliary muscle contraction causing temporary nearsightedness and blurred vision. This functional ailment, often linked to near work, is treated with cycloplegic eye drops.

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Area of Science:

  • Ophthalmology
  • Physiology

Context:

  • Spasm of accommodation is a functional visual disorder.
  • Characterized by prolonged ciliary muscle contraction.
  • Often triggered by prolonged near work and stress.

Purpose:

  • To describe the pathophysiology, symptoms, and treatment of spasm of accommodation.
  • To highlight its functional nature and common triggers.

Summary:

  • Spasm of accommodation involves sustained ciliary muscle contraction, leading to pseudomyopia and blurred distance vision.
  • Symptoms include fluctuating visual acuity, eye strain, and headaches.
  • It is a reversible condition, typically managed with cycloplegic eye drops.

Impact:

  • Improves understanding of accommodative disorders.
  • Provides a basis for diagnosing and managing functional myopia.
  • Informs strategies for visual hygiene and stress management in affected individuals.