Did you know that more than two billion people worldwide are affected by anemia?

According to theCleveland Clinic, not everyone who has it may even realize it.

While there are different types of anemia, the most common is brought on by an iron deficiency.

close-up of woman’s eyes

There are numerous signs a person is anemic, and some of them might surprise you.

Women can also have heavier than normal periods or irregular bleeding.

However, there’s another tell-tale sign you might be anemic, according to a report fromFox News.

a woman gets an eye exam

According to theNorthern Illinois Eye Clinic, anemia can affect the eyes in other ways, too.

A doctor can perform tests to determine the bang out andcause of anemiato determine the best treatment.

It’s crucial to begin treatment as soon as anemia is diagnosed.

Treatments can include prescription vitamins, dietary changes, and in severe cases, blood or iron transfusions.