The cornea is a protective and transparent layer located at the front of the eye. Its primary function is to shield the eye from foreign substances and bacteria while also filtering out harmful ultraviolet light. Additionally, the cornea plays a crucial role in vision by assisting the eye in focusing on objects both near and far. Covering the iris, which gives the eye its color, as well as the pupil, the cornea is susceptible to damage when the eye experiences trauma, resulting in what is known as a scratched cornea or corneal abrasion.
Common Causes of Corneal Scratches
Corneal scratches, also known as corneal abrasions, can occur due to various reasons. One common cause is accidentally poking the eye with a fingernail or any other object. This can lead to a scratch on the cornea, the clear protective layer covering the front of the eye. Additionally, foreign objects like sand or sawdust can enter the eye and cause abrasions on the cornea. Rubbing the eye excessively or splashing chemicals in the eye can also result in corneal scratches. Furthermore, certain eye infections have the potential to damage the cornea, leading to scratches.
Preventing Scratched Corneas when Wearing Contact Lenses
Properly using and caring for contact lenses is crucial in preventing scratched corneas, as failure to follow optician’s guidelines can increase the risk. Scratching of the cornea can occur due to poor fit, improper cleaning leading to the accumulation of dirt or dust on the lens surface, or prolonged wear beyond the recommended time.