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Postoperative Corneal Dellen Following PreserFlo MicroShunt: A Case Report
Nawaf Zaid Almeshari1, Norah Bin Dakhil2, Konrad Schargel1
1Department of Glaucoma, King Khaled Eye Specialist Hospital, Riyadh, Saudi Arabia.
The American Journal of Case Reports
|January 29, 2026
Summary
Corneal dellen, a rare complication, can occur after PreserFlo MicroShunt surgery for glaucoma. Prompt conservative treatment can lead to full recovery of the corneal surface and maintain glaucoma control.
Area of Science:
- Ophthalmology
- Glaucoma Management
- Ocular Surface Disease
Background:
- The PreserFlo MicroShunt is a subconjunctival drainage device for open-angle glaucoma.
- While generally safe, rare complications like corneal pathology can occur.
- Corneal dellen has not been previously reported after PreserFlo implantation.
Purpose of the Study:
- To report a case of corneal dellen following PreserFlo MicroShunt implantation.
- To highlight a previously undocumented complication of this glaucoma drainage device.
- To discuss the management and outcomes of this complication.
Main Methods:
- A case report of a 15-year-old male with pathological myopia and Stickler syndrome.
- PreserFlo MicroShunt implantation for secondary open-angle glaucoma.
- Observation of postoperative corneal dellen adjacent to the bleb and subsequent conservative management.
Main Results:
- The patient developed corneal stromal thinning (dellen) two weeks postoperatively.
- Conservative therapy included topical steroids, lubrication, autologous serum, and a bandage contact lens.
- Complete corneal re-epithelialization and recovery were achieved within one week.
Conclusions:
- Corneal dellen is a potential complication of PreserFlo MicroShunt surgery, especially with prominent blebs.
- Early recognition and conservative management are crucial for recovery.
- Surgeons should monitor the ocular surface for this complication post-surgery.
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