Ultrasonic measurement of the biomeciianical properties of the rabbit sclera

H. Wang, W. V. Chang, L. Moreira, D. Sanchez, N. Kasetsuwan, M. R. Bryant, P. J. McDonnell

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Abstract

Purpose. An ultrasonic technique was used to quantify the age effect on the biomechanical properties of the rabbit sciera. Methods. Eight eyes were enucleated from 4 pigmented rabbits. Two of the 4 rabbits were 2 weeks old and two were 6 months old. Intraocular pressure was maintained between 7 and 10 mm Hg for each measurement. Immediately following enucleation, shear wave measurements were performed using a 5 MHz ultrasonic transducer attached to a fused silica buffer block. A pulser/receiver card was used to generate and detect the ultrasonic wave with analog to digital transformation performed by a data acquisition card. Results. The measured shear wave velocity (C,) for the two week old rabbits was 4Q.1±12.7 m/sec, and for the six month old rabbits was 71.7ÜO.S m/sec. The calculated Young's modulus (E) for the young and adult groups were (1.8±1.0)x 106 N/m2 and (5.2±1.6}xl06 N/m2, respectively (p < 0.001). Conclusions. The Young's modulus of 2 week old rabbit scieras is less than the 6 month old ones, which suggests the elasticity of the sciera changes with the age of the rabbit.

Original languageEnglish
Pages (from-to)S290
JournalInvestigative Ophthalmology and Visual Science
Volume38
Issue number4
Publication statusPublished - 1997 Dec 1

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ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems
  • Cellular and Molecular Neuroscience

Cite this

Wang, H., Chang, W. V., Moreira, L., Sanchez, D., Kasetsuwan, N., Bryant, M. R., & McDonnell, P. J. (1997). Ultrasonic measurement of the biomeciianical properties of the rabbit sclera. Investigative Ophthalmology and Visual Science, 38(4), S290.