You may develop a gradual blurring of vision. In mild cases of corneal oedema, this typically occurs in the morning upon waking up. Vision gradually improves over the course of the day.
As the corneal oedema worsens, the vision may be constantly blurred. Patients may see halos around streetlights or car headlights, especially at night.
In advanced cases of corneal oedema, the surface of the cornea may develop blisters ("bullae") that result in pain, with risk of infection and irreversible scarring of the cornea. This is a condition that is termed "bullous keratopathy".
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