Contact lenses sometimes develop a frustrating haze or blurred appearance, often described as looking through a fogged or frosted window. This common issue, known as cloudy contacts, means the lens surface has become obscured, making vision less clear than it should be. While the cause is frequently a buildup of debris that is easily managed, cloudiness can also signal a more serious eye problem, requiring prompt attention.
Why Contact Lenses Become Cloudy
The most frequent culprits behind lens cloudiness are deposits from your body’s tear film. Tears are a complex mix of proteins, lipids (oils), and other substances meant to lubricate and protect the eye. Over time, these components naturally adhere to the lens material, creating a filmy layer that scatters light and causes blurry or hazy vision.
Protein deposits, which originate primarily from albumin and lysozyme, often present as an opaque, white, or filmy coating. Conversely, lipid deposits, which come from the meibomian glands in the eyelids, typically have a smeared or greasy whitish appearance. The lens material itself plays a role: traditional hydrogel lenses tend to attract more protein, while newer silicone hydrogel lenses may accumulate more lipids.
External contaminants also contribute to surface haze. Foreign debris like dust, smoke, airborne pollutants, or microscopic particles from makeup and hand lotions can stick to the lenses. Dry eyes can exacerbate the problem, as a lack of proper tear lubrication prevents the eye from effectively washing away these films.
A less common issue involves the interaction between the lens and its care solution. Using a solution that is incompatible with the specific lens material or using expired solution can result in residue that deposits on the lens surface. Reusing or “topping off” old solution also reduces the disinfectant effectiveness, allowing debris to remain on the lens.
Quick Fixes and Immediate Actions
When cloudiness strikes while you are wearing your lenses, the first step is always to remove them immediately. Wash your hands thoroughly with soap and water and dry them completely with a lint-free towel before handling the lens. This prevents the transfer of oils and contaminants to the lens surface.
Once the lens is out, inspect it closely. If the lens appears undamaged, clean it gently by placing a few drops of fresh solution in your palm and rubbing the lens for about ten seconds on each side. Thoroughly rinse the lens with fresh solution to wash away the loosened debris before reinserting it.
If dryness is the suspected cause, applying contact lens-compatible re-wetting drops can temporarily restore clarity. If the haze persists immediately after cleaning and reinserting the lens, discard that lens and switch to a fresh pair or wear your glasses. Continuing to wear a persistently cloudy lens can cause discomfort and potential eye irritation.
Establishing a Proper Cleaning Routine
Preventing cloudiness long-term relies on establishing a diligent daily cleaning routine. Even if your solution is labeled “no-rub,” physically rubbing the lens is the most effective way to dislodge and remove proteins, lipids, and external contaminants. Place the lens in the palm of your hand, apply fresh multipurpose solution, and gently rub both sides with your index finger before rinsing thoroughly.
It is necessary to use fresh disinfecting solution every time you store your lenses. Never attempt to reuse or “top off” the old solution in the case, as this dramatically reduces its ability to kill microorganisms and prevents proper cleaning. Additionally, never use tap water, saliva, or non-approved saline solution, as these do not disinfect and can introduce harmful pathogens.
Proper contact lens case hygiene is equally important. After removing your lenses, rinse the empty case with fresh solution and dry it with a clean tissue. Storing the case upside down with the caps off allows it to air-dry, which helps prevent the build-up of germs. You must replace your contact lens case at least every three months.
When Cloudiness Signals a Serious Problem
While most cloudiness is due to deposits or debris, it can occasionally be a symptom of a more serious underlying issue that requires professional attention. The most concerning red flags are symptoms that accompany the cloudy vision, such as persistent or severe pain, pronounced redness, or light sensitivity (photophobia). These signs can indicate a developing corneal infection, such as bacterial keratitis, or inflammation.
Other urgent warning signs include a sudden onset of cloudiness accompanied by an abnormal discharge, excessive tearing, or a persistent feeling that something is stuck in the eye. If the cloudy vision remains even after you have removed the lenses and rested your eyes, it may be related to a non-lens-related condition like a corneal injury or cataracts. Any time these symptoms occur, immediately remove your contacts and contact an eye care professional for an urgent evaluation to protect your vision.