Poor color vision

Poor color vision — sometimes called colorblindness — means you can't distinguish between certain shades of color. An eye doctor can quickly detect this deficiency.

Symptom Checker

Foot pain? Headache? Sore throat? Skin rash? Use the Symptom Checker to find out what's causing your symptom.

Tests and diagnosis

Eye exam

Eye exam — Overview covers definition, what to expect and results of vision testing.


MRI uses a magnetic field and radio waves to create detailed images of the organs and tissues within your body.

Sed rate (erythrocyte sedimentation rate)

Sed rate (erythrocyte sedimentation rate) is a simple blood test that can help detect or monitor certain inflammatory diseases.

Feb. 18, 2014