After a newborn develops keratitis, symptoms such as eye discomfort, tearing, increased tear secretion, and congestion may occur. If the cornea is infected due to disease or trauma, the inflammation of the cornea will inevitably affect the vision to varying degrees, especially if the inflammation invades the pupil area, which is more severe. After the ulcer heals, the resulting corneal scar not only obstructs the entry of light into the eye but also causes changes in the curvature and refractive index of the corneal surface, affecting vision. Generally, for newborns, the symptoms are caused by non-severe illnesses, so they are usually mild, mostly involving tearing or even secretion. In such cases, eye medications should be used early for treatment. (Specific medications should be used under the guidance of a physician.)