Contact lens loss occurs in two ways: the lens physically falls out or it becomes displaced on the eye. It is a common experience for contact lens wearers to feel a sudden loss of their lens, which happens in two ways: the lens physically falls out or it becomes displaced on the eye. Understanding the mechanisms behind both physical loss and displacement is the first step toward finding a solution. A systematic approach can help resolve the issue and prevent it from happening again.
Common Reasons Contacts Fall Out
Physical loss of a contact lens often results from a mismatch between the lens and the eye. Improper lens fit is a primary cause, where the curvature (base curve) or diameter does not align correctly with the cornea’s shape. If the lens is too flat, it may move excessively and pop out easily, while a lens that is too steep can adhere too tightly, causing discomfort.
Eye dryness is another major factor, as the tear film lubricates the eye and keeps the lens centered. Insufficient tear film causes the lens to lose stability and adhere to the eyelid, potentially flipping out upon blinking or rubbing. External debris, such as dust or an eyelash, trapped underneath the lens, can also disrupt the suction effect and lead to dislodgement. Forceful eye rubbing or sleeping in non-approved lenses also increases the likelihood of loss.
Displacement: Where Did the Lens Go?
A contact lens cannot slip completely behind the eye because of the conjunctiva. This thin membrane lines the inner surface of the eyelids and folds back to cover the white part of the eyeball. This continuous structure, known as the conjunctival fornix, creates a physical barrier that prevents any foreign object from traveling to the back of the eye.
When a lens feels “lost” on the eye, it has usually shifted from its central position on the cornea. The most frequent hiding spot is high up underneath the upper eyelid or tucked under the lower eyelid. This displacement, often caused by rubbing or a hard blink, can cause the lens to fold in half and become lodged. The primary sensation is irritation or a foreign body sensation, often accompanied by blurred vision.
Immediate Steps When a Lens is Lost
If the lens has physically fallen out, check the immediate surrounding area where you were last looking. If the lens is displaced but still on the eye, immediately wash your hands thoroughly with soap and water. Apply several drops of rewetting drops or sterile saline solution to the affected eye. This rehydrates the lens, making it more flexible and easier to move.
With your eye closed, gently massage the upper eyelid in a downward motion to encourage the lens to slide back toward the center. If this fails, look in a mirror and gently pull down the lower lid while looking up, then pull up the upper lid while looking down, scanning for the lens edge. If the lens remains stuck or if you experience persistent pain, redness, or impaired vision after removal, seek professional medical attention immediately.
Preventing Future Lens Loss
Preventing recurrence involves addressing the underlying factors that caused the loss or displacement. A proper lens fitting is paramount; consult with your optometrist to ensure the lens parameters, including the base curve and diameter, are matched to your eye’s shape. Managing dry eyes by consistently using rewetting drops throughout the day, especially in dry environments, helps maintain tear film stability.
Adopting disciplined handling practices also significantly reduces risk. Always wash your hands before touching your eyes, and avoid excessive eye rubbing, which causes displacement and loss. If you are prone to dry eyes, switching to daily disposable lenses or changing the lens material may be recommended to reduce deposit buildup and enhance comfort.