Abstract
AIMS—To evaluate whether amniotic membrane transplantation can be an effective alternative treatment for neurotrophic corneal ulcers. METHODS—Amniotic membrane transplantation was performed in 16 eyes of 15 patients with neurotrophic corneal ulcers and vision equal to or worse than 20/200. The neurotrophic state was developed following keratoplasty (four eyes), herpes zoster ophthalmicus (four eyes), diabetes mellitus (four eyes), radiation (two eyes), removal of acoustic neuroma with neuroparalysis (one eye), and herpes simplex keratitis (one eye). RESULTS—During a mean follow up period of 18.8 (SD 13.0) months, one to three layers of amniotic membrane with or without additional membrane as a patch were used for 17 procedures in 16 eyes for persistent neurotrophic corneal ulcers. All but four (76.4%) instances of amniotic membrane transplantation achieved rapid epithelialisation in 16.6 (9.0) days. Of the four eyes showing delayed healing, three eyes healed by tarsorrhaphy, and the remaining one eye with corneal perforation required penetrating keratoplasty and tarsorrhaphy. Two eyes gained vision better than 20/200. The healed corneal surface was accompanied by reduced inflammation. CONCLUSION—Amniotic membrane transplantation can be considered an effective alternative for treating severe neurotrophic corneal ulcers.
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Figure 1 .
Case 3 had previously undergone a penetrating keratoplasty with tarsorrhaphy for a progressive ulcer and descemetocele caused by herpes zoster ophthalmicus on the left eye. He developed a recurrent herpes zoster with epithelial dendrites and ulcers stained with rose bengal (A) and fluorescein (B), and progressed into disciform and necrotising stromal keratitis. This was complicated by bacterial keratitis, and a large inferior one third hypopyon (C). Following appropriate antibiotics and aciclovir, the sterilised ulcer became thin in several locations of the cornea. Amniotic membrane transplantation was performed and resulted in total healing of the ulcer with a quiet ocular surface in 13 days (D and E). After the corneal surface had been stable for 15 months (F), a repeat PKP was performed and covered with an amniotic membrane as a patch, which was dissolved in 2 weeks, and the graft showed a smooth surface and clear stroma 8 months later (G and H).
Figure 2 .
Case 4 had AIDS, had discontinued anti-HIV medications for 1 month, and developed acute herpes zoster ophthalmicus on the left eye (A) with diffuse conjunctival redness and corneal involvement (B). The cornea showed a peripheral circumlinear ulcer with infiltrate, diffuse oedema with keratic precipitates and hypopyon (C and D). Ten days after amniotic membrane transplantation the membrane dissolved, the corneal and conjunctival surfaces were no longer inflamed, and the ulcer healed with resolution of oedema, keratic precipitates, and hypopyon (E and F).
Figure 3 .
Case 15 had received multiple surgeries for recurrent retinal detachment in the left eye resulting in a persistent neurotrophic corneal ulcer with band keratopathy (A and B). Eight days after amniotic membrane transplantation (AMT), part of the membrane used as a patch started to dissolve (arrow) (C), while epithelial healing had taken place as shown by fluorescein staining (D). One month after AMT the membrane covered surface was totally healed and smooth with a small part of the membrane dissolved (indicated by asterisks) (E and F). The corneal surface continued to be stable and remained uninflamed (F).
Selected References
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