Skip to main content
SpringerLink
Log in

PCO Prevention with Endocapsular Equator Rings

  • Chapter
  • First Online:
Lens Epithelium and Posterior Capsular Opacification

  • 1623 Accesses

Abstract

An endocapsular equator ring (E-ring), a closed ring with a square edge, is made of flexible silicone. The loops of the intraocular lens (IOL) are fixed in the inner groove of the E-ring. The ring prevents development of posterior capsular opacification (PCO) by stopping the posterior movement of postoperative metamorphosed lens epithelial cells at the equator. There is no contact between the IOL and the posterior capsule. The posterior capsule retains transparency without touching the IOL. The ring, which has a 9.5-mm outer edge diameter, fits most eyes except those of patients with high myopia. Besides the high success of the device in preventing PCO, the E-ring has another important potential, that is, it facilitates late IOL exchanges. In addition, the developmental process of PCO is shown through histochemical observation.

This is a preview of subscription content, log in via an institution to check access.

Access this chapter

Log in via an institution
eBook
USD 16.99
Price excludes VAT (USA)
  • Available as EPUB and PDF
  • Read on any device
  • Instant download
  • Own it forever
Softcover Book
USD 159.00
Price excludes VAT (USA)
  • Compact, lightweight edition
  • Dispatched in 3 to 5 business days
  • Free shipping worldwide - see info
Hardcover Book
USD 109.99
Price excludes VAT (USA)
  • Durable hardcover edition
  • Dispatched in 3 to 5 business days
  • Free shipping worldwide - see info

Tax calculation will be finalised at checkout

Purchases are for personal use only

Institutional subscriptions

References

  1. Hara T, Hara T (1992) Panoramic specular microscopy of lens epithelial cells in the postoperative pseudophakic eye. J Cataract Refract Surg 18(6):589–593

    Article  CAS  PubMed  Google Scholar 

  2. Hara T, Azuma N, Chiba K et al (1992) Anterior capsular opacification after endocapsular cataract surgery. Ophthalmic Surg 23(2):94–98

    CAS  PubMed  Google Scholar 

  3. Azuma N, Hara T, Hara T (1998) Extracellular matrix of opacified anterior capsule after endocapsular cataract surgery. Graefes Arch Clin Exp Ophthalmol 236(6):531–536

    Article  CAS  PubMed  Google Scholar 

  4. Nishi O, Hara T, Hara T et al (1989) Further development of experimental techniques for refilling the lens of animal eyes with a balloon. J Cataract Refract Surg 15(5):584–588

    Article  CAS  PubMed  Google Scholar 

  5. Hara T, Sakka Y, Sakanishi K et al (1994) Complication associated with endocapsular balloon implantation in rabbit eyes. J Cataract Refract Surg 20(5):507–512

    Article  CAS  PubMed  Google Scholar 

  6. Sakka Y, Hara T, Yamada Y et al (1996) Accommodation in primate eyes after implantation of refilled endocapsular balloon. Am J Ophthalmol 21(2):210–212

    Article  Google Scholar 

  7. Nishi O (1987) Removal of lens epithelial cells by ultrasound in endocapsular cataract surgery. Ophthalmic Surg 18(8):577–580

    CAS  PubMed  Google Scholar 

  8. Caldwell D (1984) Freezing of the posterior capsule in extracapsular extraction. Highl Ophthalmol 12(7):1–14

    Google Scholar 

  9. Hara T, Hara T (1988) Observations on lens epithelial cells and their removal in anterior capsule specimens. Arch Ophthalmol 106(12):1683–1687

    Article  CAS  PubMed  Google Scholar 

  10. Hogan MJ, Alvarado JA, Weddell JE (1971) Histology of the human eye. W. B. Saunders Company, Philadelphia, p 649

    Google Scholar 

  11. Nagamoto T, Tanaka N, Fujiwara T (2009) Inhibition of posterior capsule opacification by a capsular adhesion–preventing ring. Arch Ophthalmol 127(4):471–474

    Article  PubMed  Google Scholar 

  12. Miyata Y, Oshitari T, Okuyama Y (2013) Polymethoxyflavones as agents that prevent formation of cataract: nobiletin congeners show potent growth inhibitory effects in human lens epithelial cells. Bioorg Med Chem Lett 23(1):183–187

    Article  CAS  PubMed  Google Scholar 

  13. Hara T, Hara T, Yasuda A et al (1993) Retaining postoperative anterior capsular transparency without lens epithelial cell removal. Eur J Implant Ref Surg 5(1):42–45

    Google Scholar 

  14. Hara T, Hara T (1989) Endocapsular phacoemulsification and aspiration (ECPEA)‐Recent surgical technique and clinical results. Ophthalmic Surg 20:469–475

    CAS  PubMed  Google Scholar 

  15. Hara T, Hara T, Yasuda A et al (1990) Accommodative intraocular lens with spring action. Part 1. Design and placement in an excised animal eye. Ophthalmic Surg 21(2):128–133

    CAS  PubMed  Google Scholar 

  16. Hara T, Hara T, Yasuda A et al (1992) Accommodative intraocular lens with spring action. Part 2. Fixation in the living rabbit. Ophthalmic Surg 23(9):632–635

    CAS  PubMed  Google Scholar 

  17. Ossma IL, Galvis A, Vargas LG et al (2007) Synchrony dual-optic accommodating intraocular lens. Part 2: pilot clinical evaluation. J Cataract Refract Surg 33(1):47–52

    Article  PubMed  Google Scholar 

  18. Hara T, Hara T, Narita M et al (2011) Long-term study of posterior capsular opacification prevention with endocapsular equator rings in humans. Arch Ophthalmol 129(7):855–863. doi:10.1001/archophthalmol.2011.38

    Article  PubMed  Google Scholar 

  19. Worgul BV (1982) Lens. In: Jakobiec FA (ed) Ocular anatomy, embryology, and teratology. Harper & Row, Philadelphia, p 360

    Google Scholar 

  20. Hara T, Hara T, Yamada Y (1991) “Equator ring” for maintenance of the completely circular contour of the capsular bag equator after cataract removal. Ophthalmic Surg 22(6):358–359

    CAS  PubMed  Google Scholar 

  21. Hara T, Hara T, Sakanishi K et al (1995) Efficacy of equator rings in an experimental rabbit study. Arch Ophthalmol 113(8):1060–1065

    Article  CAS  PubMed  Google Scholar 

  22. Hashizoe M, Hara T, Ogura Y (1998) Equator ring efficacy in maintaining capsular bag integrity and transparency after cataract removal in monkey eyes. Graefes Arch Clin Exp Ophthalmol 236(4):375–379

    Article  CAS  PubMed  Google Scholar 

  23. Hara T, Hara T, Hara T (2007) Preventing postoperative posterior capsule opacification with an endocapsular equator ring in a young human eye: 2-year follow-up. Arch Ophthalmol 125(4):483–486

    Article  PubMed  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Hara Eye Hospital, Nishi 1-1-1, Utsunomiya, 320-0861, Japan

    Tsutomu Hara M.D.

Authors
  1. Tsutomu Hara M.D.
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Tsutomu Hara M.D. .

Editor information

Editors and Affiliations

  1. Department of Ophthalmology, Wakayama Medical University School of Medicine, Wakayama, Wakayama, Japan

    Shizuya Saika

  2. John A. Moran Eye Center University of Utah, Salt Lake City, Utah, USA

    Liliana Werner

  3. School of Medical Sciences Anatomy & Histology, Lens Research Laboratory The University of Sydney, Sydney, New South Wales, Australia

    Frank J. Lovicu

Rights and permissions

Reprints and permissions

Copyright information

© 2014 Springer Japan

About this chapter

Cite this chapter

Hara, T. (2014). PCO Prevention with Endocapsular Equator Rings. In: Saika, S., Werner, L., Lovicu, F. (eds) Lens Epithelium and Posterior Capsular Opacification. Springer, Tokyo. https://doi.org/10.1007/978-4-431-54300-8_20

Download citation

  • DOI: https://doi.org/10.1007/978-4-431-54300-8_20

  • Published:

  • Publisher Name: Springer, Tokyo

  • Print ISBN: 978-4-431-54299-5

  • Online ISBN: 978-4-431-54300-8

  • eBook Packages: MedicineMedicine (R0)

Publish with us

Policies and ethics

Search

Navigation