A contact lens cannot actually get behind your eye. The anatomy of your eye makes this physically impossible, even though it can certainly feel like the lens has disappeared somewhere deep. A thin membrane called the conjunctiva lines the inside of your eyelids and folds back to cover the white of your eye, creating a sealed pocket. There is no opening for a lens to slip through to the back of your eyeball. What has actually happened is that the lens has slid up under your upper eyelid, folded over, or shifted to the side, and it’s sitting in one of the small folds where the membrane meets your eyelid.
Where the Lens Actually Goes
The conjunctiva creates a small pouch where it folds between your eyelid and your eyeball. Eye care professionals call this the “fornix.” The upper fornix, tucked under your upper eyelid, is the most common hiding spot for a displaced contact lens. It’s a shallow space, only a few millimeters deep, but it’s enough to trap a soft lens that has folded in half or slid off center.
Sometimes a lens lodged in the upper fornix can stay hidden for days or even weeks. In rare cases, tissue can form around a retained lens, making it harder to find without professional help. But the lens is always in this outer pocket of the eye, never behind the eyeball itself.
How to Find and Remove a Soft Lens
Start by washing your hands thoroughly with soap and water. Then follow these steps:
- Lubricate your eye. Use sterile saline solution, contact lens rewetting drops, or multipurpose contact solution. Let a steady stream flow over your open eye for several seconds. This rehydrates a dried-out lens and makes it easier to move. Do not use tap water. Tap water contains a microorganism called Acanthamoeba that can attach to contact lenses and cause a serious, painful eye infection that can last months.
- Look in the opposite direction. If you think the lens slid up, look down. If it shifted to the right, look left. This creates more space in the area where the lens is hiding and can bring it back into view.
- Gently massage through your closed eyelid. With your eye closed, use your fingertip to lightly press and sweep across your upper eyelid toward the center of your eye. This can coax a folded or stuck lens back onto the front surface of your eye where you can reach it.
- Check under your lower eyelid. Pull your lower lid down gently and look up. The lens sometimes folds and drops into the lower pocket.
- Flip your upper eyelid. This is the most effective technique if the lens is hiding in the upper fornix. Place a clean cotton swab horizontally across the outside of your upper eyelid, about halfway up. With your other hand, grasp your upper eyelashes and fold the lid upward and backward over the cotton swab, toward your forehead. Hold it there and look down. You should be able to see the pink inner surface of your eyelid and any lens stuck to it. If you spot the lens, slide it down gently with a clean fingertip or rinse it out with saline.
- Blink repeatedly in saline. Fill a small clean cup or bowl with sterile saline, lower your face into it, and blink several times. The liquid can float a stuck lens free.
Removing a Stuck Rigid (Hard) Lens
Rigid gas-permeable lenses are smaller and stiffer than soft lenses, which means they’re less likely to fold and hide under the eyelid, but they can still get stuck to the surface of your eye if it dries out. Start by applying artificial tears or sterile saline generously to re-lubricate the lens. Give it a minute to soak in before attempting removal.
If the lens still won’t budge, there is a small suction tool called a plunger designed specifically for rigid lenses. You press its soft cup against the lens surface and lift. If you don’t already have one, your eye care provider can show you how to use it and may keep one on hand for exactly this situation. Do not try to pry a stuck rigid lens off your eye with your fingernail.
How to Tell If the Lens Is Still There
This is where things get tricky. A contact lens that has dried on your eye or shifted under your eyelid causes irritation, redness, a scratchy feeling, and watery eyes. But those are also the exact symptoms of a corneal abrasion, which is a small scratch on the surface of your eye. If the lens scraped your cornea on its way out of position, you can feel like something is still in your eye even after the lens is gone.
A few clues can help you sort this out. If you can account for both lenses (one in each eye, or one in your eye and one in your case or on the floor), the sensation is likely a scratch, not a hidden lens. If you only find one lens and can’t locate the other anywhere, it may still be tucked under your eyelid. Corneal abrasions also tend to cause noticeable light sensitivity and sharper pain when you blink, while a hidden lens creates more of a persistent foreign-body pressure.
If you’ve tried the steps above and the discomfort continues for more than a few hours, an eye care provider can do a definitive check. They use a special microscope and can flip your eyelids inside out more completely than you can at home. A yellow dye called fluorescein, dropped onto the eye surface, will highlight any scratches and make it easy to confirm whether the cornea is damaged.
Preventing a Stuck Lens
Most lenses get stuck because they’ve dried out. This happens more often if you sleep in lenses not designed for overnight wear, spend long hours in dry or air-conditioned environments, or forget to blink enough while staring at a screen. Keeping rewetting drops on hand and using them throughout the day reduces the risk significantly. Replace your lenses on schedule, because older lenses lose moisture faster and are more likely to stick.
If you rub your eyes while wearing contacts, the lens can shift off your cornea and slide under your lid. Breaking the habit of rubbing, or at least closing your eye fully before touching it, helps keep the lens in place. And always keep a small bottle of sterile saline or rewetting drops nearby so you can act quickly if a lens does shift, rather than waiting until it dries out further and becomes harder to move.