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Partial-Thickness Intrastromal Lamellar Keratoplasty for Corneal Pellucid Marginal Degeneration
Thiago B Gonçalves1, Angela F B Nosé, Nicolas C Pereira
1Department of Anterior Segment, Sorocaba Eye Hospital, Sorocaba, São Paulo, Brazil.
Purpose:
Pellucid marginal degeneration (PMD) is a bilateral corneal ectatic disorder, characterized by thinning of the inferior cornea. Numerous surgical procedures have been described in the literature, and there is a lack of consensus regarding the best available surgical management. Recently, full-thickness intrastromal lamellar keratoplasty (ILK) was described as an option for treating PMD and emerged as a promising technique. However, ILK results in an irregular surface, leading to a significant residual against-therule (ATR) astigmatism.
Methods:
This study describes a variation of the ILK technique, using a partial-thickness graft to treat 2 cases of PMD.
Results:
At the final follow-up, both patients improved visual acuity and had their mean simulated keratometry flattened, although a residual ATR astigmatism remained.
Conclusions:
The ILK technique modification might lead to a more regular thickness pattern, although it did not seem efficient in reducing the ATR astigmatism.
