What defines corneal wound dehiscence?

Progressive thinning of the cornea peripheral to a graft

Epithelial ingrowth beneath a lamellar flap interface

Neovascular invasion of a healed corneal scar

Why does a corneal surgical wound remain vulnerable years after apparently complete healing?

Scar tissue never regains the tensile strength of native stroma The scar that forms is structurally different from undisturbed stroma and never regains full tensile strength, leaving a lifelong relative weakness at the old surgical site.

Sutures continue to degrade and release inflammatory mediators

The epithelium never fully covers the original incision line

Endothelial cell density falls progressively along the wound

Where does an eye with previous corneal surgery preferentially fail after blunt trauma?

At the old surgical scar rather than through healthy tissue Trauma to an eye with a prior surgical wound tends to fail preferentially at the structurally weaker old scar rather than through healthy, unoperated tissue.

At the corneal apex regardless of previous surgery

Through the sclera at the equator, sparing the cornea

At the limbus opposite the original incision

Which anterior chamber finding accompanies acute postoperative corneal wound dehiscence?

A shallow or flat anterior chamber Acute dehiscence typically presents with sudden pain, reduced vision and a shallow or flat anterior chamber, sometimes with visible wound gape, iris prolapse or frank aqueous leakage.

A deep chamber with pigment dispersion on the endothelium

A chamber filled with fibrin and a dense hypopyon

A normal chamber depth with keratic precipitates

What does a positive Seidel test demonstrate in a suspected corneal wound dehiscence?

Aqueous leaking as a streaming diluted line through fluorescein A positive Seidel test shows aqueous streaming as a diluted line through instilled fluorescein, confirming an open wound with an active leak when gross examination is inconclusive.

A full-thickness epithelial defect without stromal involvement

Retained lens fragments within the anterior chamber angle

Endothelial decompensation over the wound margin

How should the eye be examined when corneal wound dehiscence is suspected?

Gently, avoiding any additional pressure on the globe Examination must be gentle and avoid pressure on the globe, because further intraocular content can be extruded through an already compromised open wound during the assessment itself.

With firm digital tonometry to confirm hypotony

After vigorous irrigation to clear the wound surface

With scleral depression to inspect the peripheral retina

Which investigation helps assess posterior segment injury when the fundus view is obscured?

Ultrasound of the globe When the posterior segment cannot be seen, ultrasound helps assess for associated posterior injury, which matters particularly in trauma-related rather than purely postoperative wound failure.

Corneal topography of the affected quadrant

Specular microscopy of the endothelium

Anterior segment fluorescein angiography

What is the required treatment for a significant corneal wound dehiscence?

Prompt surgical repair in the operating room Significant dehiscence needs prompt theatre repair, resuturing the wound and either repositioning viable prolapsed tissue or excising tissue that is no longer viable.

A bandage contact lens with topical antibiotic cover

Aqueous suppressants until the leak seals spontaneously

Patching and review in the clinic after 48 hours

Why is broad-spectrum antibiotic cover started in corneal wound dehiscence?

Because an open ocular wound carries meaningful infection risk An open ocular wound carries a meaningful infection risk, so broad-spectrum cover is started following the same urgency and principles as a ruptured globe from any other cause.

To prevent suture-related corneal neovascularization

To reduce the inflammatory response to prolapsed iris

Because antibiotics accelerate corneal stromal healing

What most strongly determines visual outcome after repair of corneal wound dehiscence?

Whether absorbable or non-absorbable suture material was used

The patient's preoperative refractive error in that eye

The number of sutures placed at the original surgery

Corneal Wound Dehiscence

Corneal wound dehiscence is a separation or opening of a previously closed corneal or limbal surgical wound, occurring either in the early postoperative period from inadequate initial closure or, less commonly, years later from trauma or spontaneous wound failure.

It is a genuine ophthalmic emergency in most cases, since an open wound risks intraocular content prolapse, infection, and severe, sometimes irreversible visual loss if not recognized and repaired promptly.

Understanding both the acute postoperative form and the delayed, sometimes trauma-related form clarifies why any corneal or limbal surgical wound remains a point of potential vulnerability for the rest of a patient’s life, not just during the immediate recovery period.

Modern small-incision techniques have reduced the overall frequency of this complication compared to the era of larger, sutured incisions, but the underlying principle of lifelong relative wound weakness has not changed.

Causes

Inadequate initial wound construction or closure during the original surgery, including a poorly angled clear corneal incision from phacoemulsification, discussed in its own dedicated article on this site, that fails to seal properly
Premature suture removal or spontaneous suture loosening or breakage after a sutured procedure such as penetrating keratoplasty, discussed in its own dedicated article on this site
Blunt or penetrating trauma to an eye with a prior surgical wound, which tends to fail preferentially at the site of that old, structurally weaker scar rather than through healthy, unoperated tissue
Elevated intraocular pressure or vigorous eye rubbing in the early postoperative period, placing mechanical stress on a wound that has not yet achieved full structural strength

Why Old Surgical Wounds Remain Vulnerable

A corneal or limbal surgical wound never regains the full tensile strength of unoperated corneal tissue, even years after apparently complete healing, since the scar tissue that forms is structurally different from native, undisturbed stroma.

This persistent, lifelong relative weakness is why a patient with any history of penetrating keratoplasty, cataract surgery, or other corneal or limbal incisional surgery is at somewhat elevated risk of wound dehiscence specifically at that old surgical site if the eye later sustains blunt trauma, even trauma that might cause only minor injury to an eye without a surgical history.

Patients with a significant surgical history benefit from understanding this ongoing vulnerability, particularly around activities carrying meaningful risk of blunt ocular trauma, so that appropriate protective eyewear can be considered where relevant.

Test your knowledge 10 questions from this article

Clinical Presentation

Acute postoperative dehiscence typically presents with sudden pain, decreased vision, and a shallow or flat anterior chamber, sometimes with visible wound gape, iris prolapse, or frank leakage of aqueous humor from the wound.

Delayed, trauma-related dehiscence presents similarly following an injury, and the history of prior surgery at the affected site, even if remote, should immediately raise suspicion for wound rupture rather than a simple contusion injury.

A positive Seidel test, showing aqueous leakage as a streaming, diluted line through instilled fluorescein dye, confirms an open wound and active leak when the diagnosis is uncertain on gross exam alone.

Evaluation

Careful slit-lamp examination assesses the extent of wound separation, anterior chamber depth, and whether any intraocular content, including iris, lens material, or vitreous, has prolapsed through the open wound.

Imaging, including ultrasound when a view to the posterior segment is obscured, helps assess for associated posterior segment injury, particularly important in a case involving trauma rather than a purely spontaneous postoperative wound failure.

Assessment should proceed cautiously and gently, avoiding any additional pressure on the globe, given the risk of extruding further intraocular content through an already compromised, open wound during the examination itself.

Management

Prompt surgical repair in the operating room is required for any significant wound dehiscence, resuturing the wound and addressing any prolapsed tissue, whether by repositioning viable tissue or excising tissue that is no longer viable.

Broad-spectrum antibiotic coverage is initiated given the meaningful infection risk associated with an open ocular wound, following similar urgency and principles to management of a ruptured globe from any other cause.

Postoperative management after repair mirrors that of the original surgery in many respects, with particular attention to protecting the newly repaired wound from any further mechanical stress during the critical early healing period.

Visual outcome after successful repair depends heavily on how much intraocular content was lost or damaged before repair could be performed, which is one more reason prompt recognition and same-day surgical repair matter as much as the technical quality of the repair itself.

References

American Academy of Ophthalmology. Basic and Clinical Science Course, Section 8: External Disease and Cornea.
Kloek CE, Bordón AF, Chen TC, Pineda R II. Wound dehiscence after penetrating keratoplasty. Seminars in Ophthalmology.
Bowling B. Kanski’s Clinical Ophthalmology.

Test yourself

A few questions straight from this article.

1 / 10 0 correct

What defines corneal wound dehiscence?
Dehiscence is the separation or opening of a previously closed corneal or limbal surgical wound, either early after surgery from inadequate closure or years later from trauma or spontaneous failure.
Why does a corneal surgical wound remain vulnerable years after apparently complete healing?
The scar that forms is structurally different from undisturbed stroma and never regains full tensile strength, leaving a lifelong relative weakness at the old surgical site.
Where does an eye with previous corneal surgery preferentially fail after blunt trauma?
Trauma to an eye with a prior surgical wound tends to fail preferentially at the structurally weaker old scar rather than through healthy, unoperated tissue.
Which anterior chamber finding accompanies acute postoperative corneal wound dehiscence?
Acute dehiscence typically presents with sudden pain, reduced vision and a shallow or flat anterior chamber, sometimes with visible wound gape, iris prolapse or frank aqueous leakage.
What does a positive Seidel test demonstrate in a suspected corneal wound dehiscence?
A positive Seidel test shows aqueous streaming as a diluted line through instilled fluorescein, confirming an open wound with an active leak when gross examination is inconclusive.
How should the eye be examined when corneal wound dehiscence is suspected?
Examination must be gentle and avoid pressure on the globe, because further intraocular content can be extruded through an already compromised open wound during the assessment itself.
Which investigation helps assess posterior segment injury when the fundus view is obscured?
When the posterior segment cannot be seen, ultrasound helps assess for associated posterior injury, which matters particularly in trauma-related rather than purely postoperative wound failure.
What is the required treatment for a significant corneal wound dehiscence?
Significant dehiscence needs prompt theatre repair, resuturing the wound and either repositioning viable prolapsed tissue or excising tissue that is no longer viable.
Why is broad-spectrum antibiotic cover started in corneal wound dehiscence?
An open ocular wound carries a meaningful infection risk, so broad-spectrum cover is started following the same urgency and principles as a ruptured globe from any other cause.
What most strongly determines visual outcome after repair of corneal wound dehiscence?
Outcome depends heavily on how much intraocular content was lost or damaged before repair could occur, which is why prompt recognition and same-day surgery matter as much as technical quality.