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.
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From Choroida — the team behind this siteClinical 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.
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From Choroida — the team behind this siteReferences
- 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.
