Many people who wear contact lenses experience a moment of panic when a lens seems to disappear, leading to the common concern that it might have slipped behind the eye. This common concern stems from a misconception about eye anatomy. A contact lens cannot physically get lost behind the eye due to the natural structure of the eye itself.
Anatomy of the Eye Preventing Lens Loss
The eye has a protective membrane called the conjunctiva, which acts as a natural barrier. This thin, transparent membrane lines the inner eyelids and folds back to cover the white part of the eyeball. This continuous fold creates a sac-like structure, effectively sealing off the back of the eye.
Connecting the eyelid to the eyeball, the conjunctiva forms a physical barrier preventing any foreign object, including a contact lens, from moving beyond the eye’s front surface. This arrangement ensures a contact lens, even if dislodged, remains on the visible surface of the eye or tucked under the eyelid.
Why a Contact Lens Might Feel Lost
Despite the impossibility of a lens going behind the eye, the sensation of a “lost” lens is common. A contact lens might slide up under the upper eyelid or down under the lower eyelid, making it difficult to see or feel. This displacement can occur if the eye is rubbed vigorously, if the lens is dry, or if it was not inserted correctly.
A contact lens may fold in half or stick to the eye’s surface, such as the white sclera, instead of resting on the cornea. This can make the lens feel vanished, causing discomfort and the belief it has moved to an inaccessible area.
Safely Removing a Displaced Contact
If a contact lens feels lost, first wash hands thoroughly with soap and water before touching the eye. Blinking several times can sometimes help to reposition the lens. If blinking does not work, applying a few drops of rewetting solution or saline can re-lubricate the eye and the lens, making it easier to move.
Gently massage the eyelid while looking in different directions—up, down, and side to side—to help dislodge the lens from under the eyelid. If visible but stuck, gently slide the lens towards the center of the eye using a clean finger before removing it as usual. Avoid excessive rubbing, which can irritate the eye.
Addressing Concerns About Eye Health
While a contact lens cannot go behind the eye, a displaced or stuck lens can cause issues if not managed properly. Prolonged displacement can lead to eye irritation or redness. If the lens remains in the eye for an extended period, it can increase the risk of corneal abrasion or infection, especially if the eye becomes dry or is rubbed excessively.
If you experience persistent discomfort, significant redness, vision changes, or cannot remove a displaced lens after several attempts, seek professional medical attention. An eye care specialist can safely remove the lens and assess the eye for any potential complications.