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General Information

NOTE

Epithelial downgrowth is when epithelial cells from the ocular surface gain access to the inside of the eye. Any ocular surgery or even trauma involving corneal incisions or lacerations may cause corneal epithelium to track downward (epithelial downgrowth) into the anterior chamber. Epithelial ingrowth, on the other hand, is when epithelial cells invade a corneal lamellar interface; it most commonly occurs after LASIK procedures and can also be seen after SMILE.

Symptoms

Can be asymptomatic. Ocular surface irritation can occur. Decreased vision or glare symptoms may occur in advanced cases.

Signs

Workup

  1. Complete ophthalmic examination, including IOP measurement, and fluorescein staining for epithelial defects or a Seidel-positive fistula, and a dilated fundus examination.

  2. Anterior segment OCT may be helpful for visualization.

Treatment

  1. If asymptomatic and nonprogressive, can be observed.

  2. Low-setting argon laser can be applied to areas of epithelial downgrowth on the iris. This technique is mainly used to confirm the diagnosis of epithelial downgrowth (laser spots cause whitening of epithelial downgrowth but not normal iris) but has been reported to cause regression in some cases.

  3. If there is a fistula, surgical intervention to close the fistula, possibly with addition of cryotherapy, should be considered.

  4. Surgery to remove all the intraocular epithelial cells can be attempted, but is often extensive and unsuccessful. Intraocular 5-fluorouracil or methotrexate can also be used, but may require multiple injections and has a guarded prognosis.

  5. Treat increased IOP with topical medications initially. If uncontrolled, may be an indication for surgical intervention.

Follow-Up

Should be followed every 1 to 2 weeks if there are signs of progression, otherwise can be spaced to longer intervals.