
Bloodshot Eyes: Causes and When to See a Doctor
Bloodshot eyes can come from widened blood vessels, a small bleed under the surface, or inflammation. What separates them is where the redness sits and what comes with it.

Bloodshot eyes can come from widened blood vessels, a small bleed under the surface, or inflammation. What separates them is where the redness sits and what comes with it.

Blur in one eye is judged by how it began and what came with it — which patterns need same-day assessment, and which are found at a routine eye exam.

Styes and chalazia can look alike at first, but they start in different glands and behave differently. Here is how pain, location and onset separate them — and when an eyelid lump is worth having checked.

Eye floaters are shadows cast by clumps in the vitreous gel. Most come from age-related change; a sudden shower of new floaters, flashes or a spreading shadow needs a same-day eye examination.