Sleeping in contact lenses is a common habit for many people, especially those who find it inconvenient to remove their lenses before going to bed. However, this practice can have serious repercussions on eye health and overall vision.

In this article, we will explore what happens when you sleep in your contact lenses and why it is essential to follow proper lens care instructions.

The Role of Oxygen

One of the most critical aspects to consider when wearing contact lenses is the availability of oxygen to the cornea, the clear front surface of the eye. While awake, the eyes receive oxygen directly from the air.

However, contact lenses act as a barrier between the cornea and the environment. When you close your eyes during sleep, the oxygen supply from the atmosphere diminishes even further.

During the day, blinking helps circulate tears and promote oxygen flow beneath the contact lens. However, when you sleep, your eyes are closed, limiting the movement of tears and reducing oxygen levels.

This lack of oxygen can cause a variety of eye conditions and discomfort, as we will discuss further below.

Increased Risk of Eye Infections

Sleeping in contact lenses significantly increases the risk of eye infections. Bacteria, viruses, and other microorganisms can accumulate on the surface of the lens throughout the day.

When you sleep with your lenses on, these pathogens have a greater chance of adhering to the cornea and causing infection.

Fungal infections such as fungal keratitis can be particularly dangerous. These infections are often difficult to treat and can lead to permanent vision loss or the need for a corneal transplant.

Prolonged use of contact lenses during sleep also increases the chances of developing conditions like bacterial conjunctivitis and corneal ulcers.

Decreased Tear Oxygen Levels

Tears play a vital role in maintaining ocular health. They provide lubrication, nourishment, and oxygen to the cornea. During sleep, tear production decreases compared to waking hours, making it even more crucial for oxygen to reach the cornea directly.

Contact lenses act as a barrier, preventing oxygen from freely reaching the cornea and increasing reliance on oxygen supplied through the tears.

When lenses are worn overnight, eyes become deprived of oxygen, which can lead to corneal edema, or swelling, and significantly impact vision.

Compromised Eye Comfort

Sleeping in contact lenses can also result in compromised eye comfort. Extended periods of lens wear, especially while asleep, can cause dryness and irritation.

Dry eyes can lead to symptoms such as itching, redness, burning, and a gritty sensation, making it uncomfortable to wear contacts even during waking hours.

Without proper rest and oxygen replenishment, the corneas can become stressed, leading to discomfort throughout the day.

The discomfort may manifest as a persistent feeling of having an object in your eye or sensitivity to light, making routine daily activities challenging.

Increased Risk of Corneal Abrasion

Abrasions occur when the cornea’s protective outer layer is damaged or scraped off. These can be caused by physical trauma, such as rubbing your eyes while sleeping, but the risk significantly increases when wearing contact lenses overnight.

The combination of a foreign object (the lens) and reduced oxygen supply to the cornea can make it more susceptible to abrasions.

Corneal abrasions may cause severe pain, blurred vision, redness, and increased sensitivity to light. If left untreated, they can lead to corneal infections, scarring, or even permanent vision loss.

Complications with Certain Contact Lens Types

Not all contact lenses are intended for extended wear or overnight use. Some lenses are specifically designed for daily wear and require removal before sleep. Failing to adhere to the recommended usage guidelines can lead to complications.

For example, some contacts are made from materials that do not allow enough oxygen to reach the cornea. Sleeping in these lenses can significantly compromise eye health.

Additionally, rigid gas-permeable lenses, like many other types, can cause corneal molding if worn for too long, leading to vision distortion and discomfort.

The Importance of Proper Lens Care

To maintain good eye health and minimize the risks associated with contact lens wear, it is crucial to follow proper lens care instructions. This includes regular cleaning, disinfecting, and storage procedures recommended by your eye care professional.

Always ensure your hands are clean and free from any substances or oils before handling contact lenses.

Use the appropriate disinfecting solution to clean your lenses, and replace both the solution and the contact lens case frequently to prevent contamination. Avoid using tap water or saliva to wet or clean your lenses.

If you unintentionally fall asleep with your contact lenses on, it is essential to remove them as soon as you wake up.

Give your eyes a break, allow oxygen to reach the cornea, and careful monitor for any signs of discomfort, redness, or blurred vision.

Remember to replace contact lenses regularly, as recommended by your eye care provider. Over time, lenses can accumulate deposits, become less comfortable, and increase the risk of eye issues.

When to Seek Help

If you frequently find yourself sleeping in your contact lenses, it is essential to speak with your eye care professional. They can always provide guidance on the best type of lenses for your eyes and lifestyle.

In some cases, they may recommend specific contact lens types that are approved for extended wear or continuous use. However, it is crucial to follow their advice carefully and never deviate from the recommended usage guidelines.

If you experience any eye discomfort, redness, sensitivity to light, or blurred vision, remove your contact lenses immediately and consult an eye care professional.

These symptoms may indicate a serious issue that requires prompt attention and treatment.

Conclusion

Sleeping in contact lenses can have severe consequences for eye health and vision. Depriving the cornea of oxygen increases the risk of eye infections, corneal abrasions, and other complications.

It is crucial to follow proper lens care instructions, including regular cleaning and replacement.

Remember, the health of your eyes should always be a priority. If you have any concerns or questions about contact lens wear, consult an eye care professional for guidance and recommendations specific to your individual needs.