Tenon's Cyst Presenting as a Long-Term Complication following Incision Cataract Surgery

Area of Science:

• Ophthalmology
• Surgical Complications

Background:

• Tenon's cysts (conjunctival cysts) are a known, albeit infrequently reported, late complication following extracapsular cataract surgery.
• These cysts can present as large filtering blebs at the cataract incision site.

Purpose of the Study:

• To investigate the factors contributing to the formation of Tenon's cysts after cataract surgery.
• To analyze the causes of visual loss associated with these cysts.
• To evaluate the efficacy of surgical intervention and the potential for recurrence.

Main Methods:

• Case presentation of two patients diagnosed with large filtering blebs at the cataract incision site.
• Case 1: Excision of the cyst with a conjunctival autograft, followed by a two-year observation period.
• Case 2: Gonioscopic examination revealing internal wound gaping, suggesting over-filtration.

Main Results:

• In Case 1, complete cyst excision with a conjunctival autograft resulted in no recurrence during a two-year follow-up.
• In Case 2, internal wound gaping was observed, indicating potential over-filtration.
• Hypotonic maculopathy was identified as the cause of decreased vision in the second patient.

Conclusions:

• Unstable scleral tunnels are implicated as a primary factor in the development of filtering blebs (Tenon's cysts).
• Surgical excision combined with a conjunctival autograft provides a successful method for defect closure and prevents cyst recurrence.
• Over-filtration through the surgical wound can lead to hypotonic maculopathy and subsequent visual impairment.