Efficacy and Tolerance of Hypertonic Sodium Chloride (NaCl 5%) Eye Drops Without Preservatives in Corneal Edema

Inclusion Criteria: * Age over 18 years * Clinical diagnosis of symptomatic corneal edema related to chronic epithelial, secondary to corneal dystrophies, controlled infectious and inflammatory pathologies and surgical trauma already resolved. * No need for keratoplasty in the 6 months following the start of the study Exclusion Criteria:. * Visual acuity less than 1/20 in both eyes * Corneal edema caused by the following acute etiologies: trauma, infection, inflammation or Stevens-Johnson syndrome. * Glaucoma or uncontrolled hypertension. * Known allergy to any of the ingredients of the product.