Five days after a corneal abrasion, my eye feels better. when will my sight return?

Usually, yes!: In most cases, corneal abrasions completely heal leading to normal vision. We most often are concerned about recurrent corneal erosion or where the corneal surface re-opens spontaneously at the site of injury. This is best prevented with lots of artificial tears.

Variable: Depends on size, depth, location, healing rate, tear film. Usually an epithelial abrasion does not result in a scar. So once healed, vision returns.