Small high speed projectiles may embed in the cornea, the front clear window of the eye. These will rust or inflame the eye and lead to pain and redness. Those who grind, weld or work with metal are the most susceptible to foreign bodies. In some circumstances it is possible to have a projectile penetrate into the eye which is an emergency situation.
It is important to have an optometrist examine the eye as soon as you suspect you may have foreign material in your eye. Optometrists are best equipped to examine the eye under high magnification and remove the offending particles and prescribe an antibiotic drop or ointment. In emergencies, we can refer you to a surgeon.