temporarily alter vision even before permanent retinal damage develops.
Blurred vision should be checked if it is persistent, recurring, or worsening.
Sudden vision loss or a sudden major change in vision is an emergency and requires urgent medical attention.
4. A Gray or White Ring Around the Cornea
Some people develop a pale gray, blue, or white ring around the outer edge of the cornea. This is known as corneal arcus.
It is common in older adults and may simply be an age-related change.
When it develops in a younger
