A foreign body on the external eye is most commonly caused by small particles of dust, dirt, or sand entering the eye. It can also be caused by a sharp object such as a twig or a small rock entering the eye.
A foreign body on the external eye can be diagnosed by a physical examination of the eye. The eye doctor will look for signs of redness, swelling, and pain in the eye. They may also use a magnifying glass to inspect the eye for any foreign objects.
The differential diagnosis for a foreign body on the external eye includes conjunctivitis, corneal abrasions, and corneal ulcers.
Treatment for a foreign body on the external eye usually involves the removal of the foreign body. This can be done manually or with the use of an instrument. In some cases, antibiotics may be prescribed to prevent possible infection.
The prognosis for a foreign body on the external eye is generally good, as long as the foreign body is removed in a timely manner. If the foreign body is not removed, it can cause infection, inflammation, and even vision loss.