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Related Experiment Videos

Amniotic membrane corrects surgically induced astigmatism.

Xingtao Zhou1, Sae Heun Rho, Kyung Won Yoo

  • 1Department of Ophthalmology, Dong-A University, College of Medicine and Institute of Medical Science, Pusan, Korea.

Ophthalmologica. Journal International D'Ophtalmologie. International Journal of Ophthalmology. Zeitschrift Fur Augenheilkunde
|November 11, 2006
PubMed
Summary

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Human amniotic membrane (AM) did not maintain astigmatism correction after photoastigmatic refractive keratectomy (PARK) in rabbits. Instead, AM eliminated PARK-induced astigmatism and prevented surgically induced astigmatism, suggesting its potential for controlling refractive surgery-induced astigmatism.

Area of Science:

  • Ophthalmology
  • Regenerative Medicine
  • Corneal Surgery

Background:

  • Human amniotic membrane (AM) is utilized for ocular surface reconstruction.
  • The efficacy of AM in maintaining astigmatism correction post-surgery is not well-established.

Purpose of the Study:

  • To investigate the effect of human amniotic membrane (AM) on astigmatism correction after photoastigmatic refractive keratectomy (PARK) in a rabbit model.
  • To determine if AM can preserve the intended refractive outcome or influence surgically induced astigmatism.

Main Methods:

  • Photoastigmatic refractive keratectomy (PARK) was performed on rabbit corneas.
  • Human amniotic membrane (AM) grafts were applied to the operated corneas.
  • Corneal topography and cycloplegic refraction were used to evaluate astigmatism changes.

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Main Results:

  • AM did not demonstrate efficacy in maintaining the correction of astigmatism induced by PARK.
  • AM significantly eliminated the astigmatism created by the PARK procedure.
  • AM also prevented the development of additional surgically induced astigmatism.

Conclusions:

  • Human amniotic membrane (AM) does not maintain astigmatism correction following PARK.
  • AM possesses properties that can eliminate and prevent astigmatism induced by laser refractive surgery.
  • Further clinical investigations are warranted to confirm AM's role in controlling astigmatism in refractive surgery.