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  • 1Department of Civil and Mechanical Engineering, University of Cassino and Southern Lazio, 03043, Cassino, Italy.

Biomechanics and Modeling in Mechanobiology
|March 15, 2017
PubMed
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Blast overpressure can damage eyes. Experiments show the bony orbit amplifies pressure waves, creating hazardous standing waves that enhance ocular tissue loading, corroborating numerical findings.

Area of Science:

  • Ophthalmology
  • Biomechanics
  • Trauma research

Background:

  • Understanding traumatic ocular injury mechanisms is crucial for diagnosis and developing eye protection.
  • The dynamics of primary blast injury mechanisms, particularly the role of pressure wave propagation, remain challenging to comprehend.
  • Previous numerical studies suggested orbital geometry amplifies blast pressure, creating hazardous standing waves.

Purpose of the Study:

  • To find experimental evidence supporting the numerical findings on blast-induced ocular injury.
  • To investigate the phenomenon of pressure wave amplification within the orbital cavity.
  • To evaluate the response of porcine eyes to blast overpressure.

Main Methods:

  • Conducted experiments using porcine eyes subjected to blast overpressure from firecracker explosions.
Keywords:
AmplificationExperimental studyOrbital cavityPressure standing wavePrimary blast injury

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  • Mounted enucleated porcine eyes within a dummy orbit to simulate the orbital cavity effect.
  • Measured pressure responses during explosions to assess wave amplification.

    • Main Results:

    • Experimental measurements corroborated numerical evidence of high-frequency pressure amplification.
    • The orbital cavity effect was confirmed to enhance the loading on ocular tissues.
    • Blast overpressure, amplified by orbital bony walls, creates hazardous conditions for eye tissues.

    Conclusions:

    • The study provides experimental validation for the hazardous effects of blast-induced pressure waves on ocular tissues.
    • Orbital geometry plays a significant role in amplifying blast pressure, increasing the risk of eye injury.
    • Findings emphasize the importance of considering the resonance cavity effect in understanding and preventing ocular blast trauma.