Anterior-posterior asymmetry in iris mechanics measured by indentation

Experimental Eye Research

Volumn 93, Issue 4, 2011, Pages 475-481

  Whitcomb, Julie E ^a   Amini, Rouzbeh ^a   Simha, Narendra K ^a   Barocas, Victor H ^a  

^a University of Minnesota   (United States)

Author keywords

Dilator; Elastic modulus; Finite element analysis; Glaucoma; Intraoperative floppy iris syndrome; Smooth muscle mechanics; Sphincter; Stroma

Indexed keywords

ALPHA SMOOTH MUSCLE ACTIN;

ANIMAL TISSUE; ARTICLE; CORNEA STROMA; EXTRAOCULAR MUSCLE; HISTOLOGY; IRIS; MEMBRANE PERMEABILITY; MUSCLE FUNCTION; MUSCLE RELAXATION; MUSCLE STRESS; NONHUMAN; PIGMENT EPITHELIUM; PRIORITY JOURNAL; RELAXATION TIME; SURFACE PROPERTY; TISSUE STRUCTURE; VISCOELASTICITY;

ACTINS; ANIMALS; BIOMECHANICS; COMPRESSIVE STRENGTH; ELASTIC MODULUS; ELASTICITY; IRIS; MODELS, BIOLOGICAL; MUSCLE, SMOOTH; SWINE;

EID: 80055046591     PISSN: 00144835     EISSN: 10960007     Source Type: Journal    
DOI: 10.1016/j.exer.2011.06.009     Document Type: Article

References (32)

1. Al-Qaisi M.K., Akkin T. Polarization-sensitive optical coherence tomography based on polarization-maintaining fibers and frequency multiplexing. Optics Express Aug 18 2008, 16(17):13032-13041.
2. Chang D.F., Campbell J.R. Intraoperative floppy iris syndrome associated with tamsulosin. Journal of Cataract and Refractive Surgery Apr 2005, 31(4):664-673.
3. Chiravarambath, S.S., Feb 2006. Indentation of Articular Cartilage. University of Minnesota-M.S Thesis. Major: Aerospace Engineering.
4. Costa K.D., Yin F.C. Analysis of indentation: implications for measuring mechanical properties with atomic force microscopy. Journal of Biomechanical Engineering Oct 1999, 121(5):462-471.
5. Epstein D., Allingham R., Schuman J. Chandler and Grant's Glaucoma 1997, Williams & Wilkins, Baltimore. fourth ed.
6. Ebenstein D.M., Pruitt L.A. Nanoindentation of biological materials. Nanotoday Aug 2006, 1(3):26-33.
7. Farrar S.M., Shields M.B. Current concepts in pigmentary glaucoma. Survey of Ophthalmology Jan-Feb 1993, 37(4):233-252.
8. Freddo T.F. Ultrastructure of the iris. Microscopy Research and Technique Apr 1 1996, 33(5):369-389.
9. Hayes W.C., Keer L.M., Herrmann G., Mockros L.F. A mathematical analysis for indentation tests of articular cartilage. Journal of Biomechanics Sep 1972, 5(5):541-551.
10. Heys J., Barocas V.H. Mechanical characterization of the bovine iris. Journal of Biomechanics Sep 1999, 32(9):999-1003.
11. Heys J.J., Barocas V.H. Computational evaluation of the role of accommodation in pigmentary glaucoma. Investigative Ophthalmology & Visual Science Mar 2002, 43(3):700-708.
12. Hogan M.J., Alvarado J.A., Weddell J.E. Histology of the Human Eye: An Atlas and Textbook 1971, WB Saunders Company.
13. Huang E.C., Barocas V.H. Active iris mechanics and pupillary block: steady-state analysis and comparison with anatomical risk factors. Annals of Biomedical Engineering Sep 2004, 32(9):1276-1285.
14. Machiraju C., Phan A.V., Pearsall A.W., Madanagopal S. Viscoelastic studies of human subscapularis tendon: relaxation test and a Wiechert model. Computer Methods and Programs in Biomedicine Jul 2006, 83(1):29-33.
15. Mak A.F., Lai W.M., Mow V.C. Biphasic indentation of articular cartilage-I. Theoretical analysis. Journal of Biomechanics Feb 1987, 20(7):703-714.
16. Mow V.C., Kuei S.C., Lai W.M., Armstrong C.G. Biphasic creep and stress relaxation of articular cartilage in compression: theory and experiments. Journal of Biomechanical Engineering Feb 1980, 102(1):73-85.
17. Niyadurupola N., Broadway D.C. Pigment dispersion syndrome and pigmentary glaucoma - a major review. Clinical & Experimental Ophthalmology Dec 2008, 36(9):868-882.
18. Olsen T.W., Sanderson S., Feng X., Hubbard W.C. Porcine sclera: thickness and surface area. Investigative Ophthalmology & Visual Science Aug 2002, 43(8):2529-2532.
19. Oyen M.L., Cook R.F. A practical guide for analysis of nanoindentation data. Journal of the Mechanical Behavior of Biomedical Materials Aug 2009, 2(4):396-407.
20. Prata T.S., Palmiero P.M., Angelilli A., Sbeity Z., Moraes C.G.D., Liebmann J.M., Ritch R. Iris morphologic changes related to alpha(1)-adrenergic receptor antagonists implications for intraoperative floppy iris syndrome. Ophthalmology May 2009, 116(5):877-881.
21. Quigley H.A., Silver D.M., Friedman D.S., He M., Plyler R.J., Eberhart C.G., Jampel H.D., Ramulu P. Iris cross-sectional area decreases with pupil dilation and its dynamic behavior is a risk factor in angle closure. Journal of Glaucoma Mar 2009, 18(3):173-179.
22. Raghupathy R., Barocas V.H. Generalized anisotropic inverse mechanics for soft tissues. Journal of Biomechanics Aug 2010, 132(8).
23. Ritch R. Pigment dispersion syndrome - update 2003. Glaucoma 2004, 177-192. Springer-Verlag, Berlin.
24. Santaella R.M., Destafeno J.J., Stinnett S.S., Proia A.D., Chang D.F., Kim T. The effect of alpha(1)-adrenergic receptor antagonist tamsulosin (Flomax) on iris dilator smooth muscle anatomy. Journal of Ophthalmology May 2010, 161-6420.
25. Silver D.M., Quigley H.A. Aqueous flow through the iris-lens channel: estimates of differential pressure between the anterior and posterior chambers. Journal of Glaucoma Apr 2004, 13(2):100-107.
26. Simha N.K., Jin H., Hall M.L., Chiravarambath S., Lewis J.L. Effect of indenter size on elastic modulus of cartilage measured by indentation. Journal of Biomechanical Engineering Oct 2007, 129(5):767-775.
27. Takmaz T., Can I. Clinical features, complications, and incidence of intraoperative floppy iris syndrome in patients taking tamsulosin. European Journal of Ophthalmology Nov-Dec 2007, 17(6):909-913.
28. Takmaz T., Can I. Intraoperative floppy-iris syndrome: do we know everything about it?. Journal of Cataract and Refractive Surgery Jun 2007, 33(6):1110-1112.
29. Vajpayee R.B., Angra S.K., Honavar S.G., Taherian K. Protection of the iris by lamellar dissection of corneal layers a technique in penetrating keratoplasty. Cornea Jan 1994, 13(1):16-19.
30. Walraevens J., Willaert B., De Win G., Ranftl A., De Schutter J., Sloten J.V. Correlation between compression, tensile and tearing tests on healthy and calcified aortic tissues. Medical Engineering & Physics Nov 2008, 30(9):1098-1104.
31. Whitcomb J., Amini R., Al-Qaisi M.K., Akkin T., Barocas V.H. Effect of the posterior location on the iris concavity during dilation. IOVS 2010, 604. ARVO Abstract 5549. Proceedings of the ARVO 2010 Annual Meeting.
32. Whitcomb J.E., Barnett V.A., Olsen T.W., Barocas V.H. ex vivo porcine iris stiffening due to drug stimulation. Experimental Eye Research May 18 2009, 89(4):456-461.