It is a common concern for contact lens wearers whether a lens can get lost behind the eye. Fortunately, the structure of the eye makes it physically impossible for a contact lens to slip into this area. While a lens might dislodge and feel lost, it always remains on the front surface of the eye, accessible for retrieval. This understanding can alleviate much of the anxiety associated with a displaced lens.
The Eye’s Protective Anatomy
The eye possesses a natural anatomical barrier that prevents foreign objects, including contact lenses, from going behind the eyeball. This protective structure is primarily the conjunctiva, a thin, clear membrane. The conjunctiva lines the inner surface of the eyelids and then folds back to cover the white part of the eyeball, known as the sclera. This continuous membrane forms a sealed pocket, effectively creating a barrier that ensures nothing can pass behind the eye.
Where Lenses Actually Go When Lost
When a contact lens feels “lost” in the eye, it has not moved behind the eyeball. Instead, the lens typically dislodges from its proper position on the cornea and moves to another area of the front of the eye. Common scenarios include the lens folding in half and getting tucked under an eyelid, often the upper eyelid. It might also shift to the corners of the eye or become stuck in the fornix, which is the deepest part of the conjunctival sac. Sometimes, the sensation of a lost lens occurs even when the lens has simply fallen out of the eye without the wearer noticing.
Safe Lens Retrieval
If a contact lens becomes displaced, staying calm is important as the lens is still on the surface of the eye. The following steps can help you safely retrieve it:
Thoroughly wash and dry your hands to prevent infection.
Use a mirror and good lighting to locate the lens, gently pulling down your lower eyelid or lifting your upper eyelid.
If the lens is visible or stuck, apply rewetting drops or sterile saline solution to lubricate the eye and lens.
Close your eye and gently massage your eyelid to encourage the lens to move to the center for removal.
Looking in the opposite direction of where the lens is stuck can also help dislodge it.
If the lens cannot be retrieved or eye irritation persists, consult an optometrist.