Author reply

We thank Dr Huevra for his interest and thoughtful comments on our paper and largely agree with his views on managing this problematic condition. We did not set out to compare topical with subconjunctival delivery of interferon—this was beyond the scope of the original study. As Dr Huevra points out, topical treatment has a better patient acceptance and side effect profile. On the issue of compliance, our clinical impression is that it is high for topical treatment; we suspect because many patients' fear of cancer.

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