What's better for recurrent corneal erosions: keratectomy?

Meds then surgery. Usually you want to move from least to most aggressive treatment. Utilizing topical and oral anti-inflammatories as well as lubricating treatment should be tried first. Then superficial keratectomy and diamond polishing can be used followed by possible stromal puncture and laser ptk.
Depends. Recurrent erosions are usually a result of previous trauma to the epithelium resulting in poor adhesion to the underlying basement membrane. Keeping the eye lubricated is an important first step, but utimately I do recommend a superficial keratectomy to allow the "new" epithelial layer to form adequate adherence to the underlying basement membrane.