New Structure Found in Human Cornea

The discovery of a thin, durable layer near the back of the cornea may lead to safer corneal surgeries.

By | June 14, 2013

A new structure has been found on the human cornea.WIKIMEDIA, PETR NOVAK

At a mere 15 microns thick, an incredibly strong layer has been discovered sandwiched within the human cornea. The new layer is called Dua’s layer, after its discoverer Harminder Dua, an ophthalmologist at the University of Nottingham. Dua and his team published their findings in the journal Ophthalmology.

Previously, the human cornea, which is approximately 550 microns thick, was thought to be comprised of five layers: from front to back, the corneal epithelium, Bowman’s layer, the corneal stroma, Descemet’s membrane, and the corneal endothelium. Based on clinical experience with corneal transplants, Dua suspected a layer existed between the corneal stroma and Descemet’s membrane. To prove the existence of this layer, Dua’s team carried simulated corneal transplantations on several donated human eyes. These surgeries typically involve first separating corneal layers by pumping small air bubbles in between them and then removing and replacing the diseased layer. By injecting even smaller bubbles, the scientists were able to reveal the new Dua’s layer, whose unique structure they confirmed with electron microscopy.

The discovery may bring about improved outcomes for patients undergoing corneal grafts and transplants. Because Dua’s layer, composed primarily of collagen, is so strong, surgeons performing certain types of corneal surgeries could plan to inject air closer to this layer, rather than near more fragile layers that are more prone to tearing.

The discovery could also advance the understanding and treatment of several cornea diseases, including acute hydrops, Descematocele, and pre-Descemet’s dystrophies.

“This is a major discovery that will mean that ophthalmology textbooks will literally need to be re-written,” said Dua in a statement. “Having identified this new and distinct layer deep in the tissue of the cornea, we can now exploit its presence to make operations much safer and simpler for patients. From a clinical perspective, there are many diseases that affect the back of the cornea which clinicians across the world are already beginning to relate to the presence, absence or tear in this layer.”

Advertisement

Add a Comment

Avatar of: You

You

Processing...
Processing...

Sign In with your LabX Media Group Passport to leave a comment

Not a member? Register Now!

LabX Media Group Passport Logo
Advertisement

Popular Now

  1. Antibiotics and the Gut Microbiome
  2. Sex Differences in Pain Pathway
  3. The Sum of Our Parts
    Features The Sum of Our Parts

    Putting the microbiome front and center in health care, in preventive strategies, and in health-risk assessments could stem the epidemic of noncommunicable diseases.

  4. Anti-Vax Doctor Found Dead
    The Nutshell Anti-Vax Doctor Found Dead

    Police are calling the death of James Bradstreet, a physician who claimed vaccines cause autism and offered autism cures to patients, an apparent suicide.

Advertisement
Shimadzu Scientific
Shimadzu Scientific
Advertisement
The Scientist