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Related Concept Videos

Focusing of Light in the Eye01:16

Focusing of Light in the Eye

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Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...
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Related Experiment Video

Updated: Apr 4, 2026

Three Different Protocols of Corneal Collagen Crosslinking in Keratoconus: Conventional, Accelerated and Iontophoresis
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Three Different Protocols of Corneal Collagen Crosslinking in Keratoconus: Conventional, Accelerated and Iontophoresis

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Photorefractive Keratectomy in Keratoconus.

Deepali Sandeep Tambe1, Anders Ivarsen1, Jesper Hjortdal1

  • 1Department of Ophthalmology, Aarhus University Hospital, Aarhus, Denmark.

Case Reports in Ophthalmology
|September 2, 2015
PubMed
Summary

Topography-guided photorefractive keratectomy (PRK) may effectively reduce myopia and astigmatism in keratoconus patients, potentially delaying or replacing corneal transplantation. The study found a low risk of keratoconus progression after PRK.

Area of Science:

  • Ophthalmology
  • Corneal Surgery
  • Vision Science

Background:

  • Keratoconus is a progressive corneal disease causing irregular astigmatism and vision loss.
Keywords:
KeratoconusPhotorefractive keratectomyRefractive surgical procedures

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  • Contact lens intolerance is common in keratoconus patients.
  • Corneal transplantation is a definitive treatment but carries risks and long recovery times.