A foreign body is something such as an eyelash, sawdust, sand, metal or dirt can gets into the eyes. The main symptom is irritation or deep pain. Depending on what it is and how the injury happened, the foreign body may pierce the eye and cause serious injury or it may simply go away with no long-term problem.
The foreign object may set off an inflammatory cascade, resulting in dilation of the surrounding vessels and subsequent edema of the lids, conjunctiva, and cornea. If not removed, a foreign body can cause infection.
If anything is stuck in your eye for more than a period of a couple of hours, you must immediately cease all attempts to remove it yourself. Keep in mind that the eyes are an extremely delicate organ and any attempts to try anything extra ordinary with them can only have negative and adverse results. If the foreign body you are talking about is not bothering you too much, then you are advised to visit an eye doctor to take care of it. If not you may need to call to emergency service of your region.
If there is a foreign body in your eye, such as a piece of grit, your eye doctor may try and remove it. They will put anesthetic eye drops in your eye first, in order to numb it and prevent any pain.
If the foreign body is easy to get to, it may be possible to remove it by simply rinsing your eye with water, or by wiping it away with a cotton wool bud or triangle of card. However, if this is unsuccessful, your eye doctor may try and remove the foreign body by lifting it out with the tip of a small metal instrument.
The foreign body could be stuck underneath your upper eyelid, especially if you can feel something there, or you have scratches or grazes (abrasions) on the top half of the transparent outer layer of your eye (cornea). If this is the case, it may be necessary to gently turn your eyelid inside out in order to remove the foreign body.
Once the anesthetic eye drops have worn off, your eye may feel a bit uncomfortable until your abrasion heals.
Whatever is happening with your eyes or if you suffer or even suspect that a foreign body has penetrated the outer eye layer better go without delay to the nearest treatment center. Doing nothing can lead to loss of vision, premature cataracts and damage to the retina so do not take any chances, delay is dangerous.