Sleeping in contact lenses is generally unsafe, but some lenses are FDA-approved for overnight wear under strict conditions.
Understanding Overnight Contact Lens Wear
Sleeping in contact lenses isn’t just a convenience—it’s a decision that can impact your eye health significantly. Most eye care professionals advise against wearing contacts while you sleep because it reduces oxygen flow to the cornea. This oxygen deprivation can cause discomfort, dryness, and increase the risk of infections like microbial keratitis.
However, not all contacts are created equal. Some specialty lenses have been designed and approved for extended or overnight wear. These lenses allow users to keep them in for multiple days, including sleeping hours, but only under strict medical supervision and hygiene routines.
The question “Are There Contacts You Can Sleep In?” boils down to understanding the types of lenses available, their materials, and the risks involved. Wearing any lens overnight without proper guidance can lead to serious complications.
Types of Contact Lenses and Their Suitability for Sleeping
Contact lenses come in various materials and designs, each with different oxygen permeability levels. Oxygen permeability is crucial because your cornea gets oxygen directly from the air, not blood vessels like other parts of your body.
Soft Contact Lenses
Soft lenses are made from hydrogels or silicone hydrogel materials. Silicone hydrogel lenses have higher oxygen permeability than traditional hydrogel ones, making them more breathable.
- Daily Wear Soft Lenses: These are designed to be worn during waking hours only and removed before sleep.
- Extended Wear Soft Lenses: Some silicone hydrogel lenses are approved for up to 6 nights or even 30 days of continuous wear.
Despite their design for extended use, these lenses still carry risks if worn overnight without proper care.
Rigid Gas Permeable (RGP) Lenses
RGP lenses are smaller and harder than soft lenses but allow excellent oxygen flow because they don’t cover the entire cornea. They are usually not recommended for overnight wear as they can cause discomfort during sleep due to their rigidity.
Scleral Lenses
Scleral lenses vault over the cornea and rest on the sclera (white part of the eye). They provide excellent comfort for people with irregular corneas or dry eyes but generally aren’t intended for sleeping since they cover a large portion of the eye surface.
The Science Behind Sleeping in Contacts
Your cornea needs a constant supply of oxygen to stay healthy. When you close your eyes during sleep, oxygen availability naturally decreases by about 90%. Wearing contact lenses further blocks oxygen transmission depending on their material and thickness.
This lack of oxygen can cause:
- Corneal swelling (edema)
- Reduced tear exchange
- Increased risk of infection
- Inflammation
Studies show that sleeping in non-approved contacts increases the risk of serious eye infections by up to sixfold compared to daily removal.
Oxygen Permeability Ratings Explained
Oxygen permeability is measured by a value called Dk (material’s ability to transmit oxygen). The higher the Dk, the better oxygen passes through the lens.
Another important measure is Dk/t, where “t” is lens thickness — thinner lenses allow more oxygen through even if Dk is moderate.
| Lens Type | Typical Dk Range | Suitable For Overnight Wear? |
|---|---|---|
| Hydrogel Soft Lenses | 20–40 | No |
| Silicone Hydrogel | 60–175 | Yes (some FDA-approved brands) |
| Rigid Gas Permeable | 30–160 | Generally no |
| Scleral Lenses | Varies | No |
Lenses with high Dk values made from silicone hydrogel materials are most suitable for overnight use when prescribed by an eye care professional.
FDA Approval and Extended Wear Contact Lenses
The FDA classifies contact lens wear into categories:
- Daily Wear: Remove before sleeping.
- Extended Wear: Approved for continuous use up to 6 nights or 30 days depending on brand.
Only a few brands have FDA approval for overnight wear. These include:
- Acuvue Oasys (up to 6 nights)
- Air Optix Night & Day Aqua (up to 30 days)
Even with these approvals, extended wear should be limited to users who have been thoroughly evaluated by an eye doctor. Not everyone is a candidate due to individual eye health factors like tear production and susceptibility to infections.
Risks Associated With Sleeping in Contacts
Ignoring guidelines about sleeping in contacts can lead to severe consequences:
Infections
Microbial keratitis is a dangerous infection that can cause permanent vision loss if untreated. Sleeping in contacts traps bacteria under the lens longer than usual, creating an ideal environment for germs to grow.
Corneal Hypoxia
Oxygen deprivation leads to corneal swelling which causes blurred vision, discomfort, and increased risk of ulcers.
Giant Papillary Conjunctivitis (GPC)
This allergic reaction results from protein buildup on lenses worn too long. It causes itching, redness, and lens intolerance.
Dryness and Irritation
Contacts absorb moisture from your eyes; wearing them overnight worsens dryness leading to irritation upon waking.
Proper Care If You Choose Extended Wear Lenses
If your optometrist prescribes extended wear contacts approved for overnight use:
- Follow all instructions: Remove them as scheduled; do not exceed recommended duration.
- Maintain hygiene: Clean hands before handling; disinfect lenses properly.
- Regular check-ups: Visit your eye doctor frequently to monitor eye health.
- Avoid swimming or showering: Water exposure increases infection risk when wearing contacts.
- Watch out for symptoms: Redness, pain, blurred vision require immediate removal and medical attention.
Neglecting these steps nullifies any safety benefits offered by extended wear designs.
The Bottom Line: Are There Contacts You Can Sleep In?
Yes—but only specific silicone hydrogel contact lenses approved by regulatory bodies like the FDA allow safe overnight wear under strict conditions. Most contact lenses aren’t meant for sleeping because they cut off vital oxygen supply and raise infection risks dramatically.
If you’re tempted by the convenience of sleeping in contacts regularly, consult your eye doctor first. They’ll evaluate your eyes’ health status and recommend whether extended wear options suit you or if daily removal remains safest.
Remember: healthy eyes mean clear vision tomorrow!
Key Takeaways: Are There Contacts You Can Sleep In?
➤ Sleeping in contacts can reduce oxygen to your eyes.
➤ Extended wear lenses are designed for overnight use.
➤ Non-approved lenses increase risk of infection.
➤ Always follow your eye care professional’s advice.
➤ Remove contacts if you experience discomfort or redness.
Frequently Asked Questions
Are There Contacts You Can Sleep In Safely?
Yes, some contact lenses are FDA-approved for overnight wear under strict medical supervision. These extended wear lenses are designed with materials that allow higher oxygen permeability, reducing risks. However, sleeping in contacts without guidance can lead to serious eye infections and complications.
Are There Contacts You Can Sleep In Without Risk?
Wearing contacts overnight always carries some risk. Even lenses approved for extended wear require careful hygiene and regular check-ups. Most eye care professionals recommend removing contacts before sleep to avoid dryness, discomfort, and infections like microbial keratitis.
Are There Contacts You Can Sleep In for Multiple Nights?
Certain silicone hydrogel lenses are approved for continuous wear up to 6 nights or even 30 days. These lenses allow oxygen to reach the cornea better than traditional soft lenses, but extended overnight use should only be done under strict medical supervision to minimize risks.
Are There Contacts You Can Sleep In if You Have Dry Eyes?
Scleral lenses may provide comfort for dry eyes but generally aren’t intended for overnight use because they cover a large portion of the eye’s surface. Sleeping in contacts with dry eyes can worsen symptoms and increase infection risk, so consult your eye care professional first.
Are There Contacts You Can Sleep In That Don’t Reduce Oxygen Flow?
No contact lens completely eliminates oxygen reduction during sleep. However, rigid gas permeable (RGP) lenses allow more oxygen flow than soft lenses but are usually uncomfortable to wear overnight. Extended wear silicone hydrogel lenses strike a balance but still require caution.
Conclusion – Are There Contacts You Can Sleep In?
Sleeping in contact lenses isn’t inherently safe unless you use specialized extended-wear silicone hydrogel lenses prescribed by an eye care professional. These few FDA-approved brands provide enough oxygen permeability for limited overnight use but still require careful hygiene and monitoring. For most people, removing contacts every night remains essential to avoid infections, dryness, and corneal damage. So next time you wonder “Are There Contacts You Can Sleep In?”, know that while options exist, safety always comes first!