No, scleral lenses are not permanent.
They are specialised contact lenses intended for daily wear and long-term therapeutic use and must be removed daily, typically after 10–14 hours of wear.
Although they offer remarkable benefits for those with specific eye conditions, they are not a permanent solution and require ongoing maintenance and care.
Scleral lenses have gained popularity due to their ability to improve vision and provide relief for those with certain ocular conditions. This blog will explore how scleral lenses work, their benefits, the factors that contribute to their non-permanency, and essential care guidelines. By the end, you will have a comprehensive understanding of how scleral lenses function and their suitability for your needs.
Understanding Scleral Lenses
What Are Scleral Lenses?
Scleral lenses are large, gas-permeable contact lenses that arch over the cornea and rest comfortably on the sclera, the white outer layer of the eye. In contrast to traditional contact lenses that rest directly on the cornea, scleral lenses establish a fluid reservoir between the lens and the cornea. This unique design supports better vision and alleviates discomfort, particularly for individuals with irregular corneas or severe dry eye.
Key Features:
- Larger than regular contact lenses, typically ranging from 14.5 to 20 mm in diameter.
- Customised to fit each eye for precise comfort and effectiveness.
- Made from durable materials that allow oxygen to pass through, ensuring corneal health.
Who Are They For?
Scleral lenses are particularly beneficial for individuals with the following conditions:
- Keratoconus: A medical condition characterised by the thinning and cone-like deformation of the cornea.
- Severe Dry Eye: Including cases caused by Sjögren’s syndrome or graft-versus-host disease.
- Corneal Irregularities: From surgeries, scarring, or injuries.
- Refractive Errors: For instance, astigmatism that cannot be corrected with traditional lenses.
This makes scleral lenses a life-changing alternative for people who find other vision correction methods inadequate or uncomfortable.
Why Are Scleral Lenses Not Permanent?
Daily Removal Is Essential
Scleral lenses are specifically designed for daily use and are not approved for overnight wear in most cases, unless under strict medical supervision. Wearing them beyond the recommended time can lead to oxygen deprivation in the cornea and increase the risk of complications, such as eye infections or swelling.
While their durable materials support extended hours of wear, they still need to be removed, cleaned, and stored properly at the end of each day. This regular maintenance ensures both the health of your eyes and the longevity of the lenses.
Replacement Is Necessary
Another key reason scleral lenses are not permanent is that they have a lifespan. Depending on the manufacturer, care routine, and guidance from your eye care provider, scleral lenses typically last between one to two years. Over time, lenses can accumulate deposits and scratches, making them less effective and potentially uncomfortable.
Your eye care professional will recommend replacements based on signs of wear or if the lenses no longer fit properly.
Key Factors That Affect Longevity:
- Frequency of use
- Proper cleaning and storage
- Avoiding contact with harmful substances
- Regular consultations with your optometrist
Eyes Are Dynamic
Human eyes naturally change over time due to ageing, health conditions, or lifestyle changes. Since scleral lenses are precisely custom-fitted, even subtle changes in corneal shape or eye surface anatomy over time may require refitting or new lenses. This adaptability ensures the lenses remain effective and comfortable, but underscores that they are not a one-time, permanent fix.
Do Not Cure Underlying Issues
While scleral lenses provide remarkable relief and improved vision, they do not cure the underlying problem, causing the necessity for the lenses. They are considered a therapeutic solution, offering management rather than a permanent resolution for corneal irregularities, dry eye, or other conditions.
Benefits Despite Their Temporary Nature
Though not permanent, scleral lenses offer unmatched benefits that make them a valuable option for many.
- Long-Lasting Comfort:
The fluid-filled reservoir keeps the eye hydrated, which is particularly beneficial for individuals suffering from chronic dry eye.
- Improved Vision:
Their unique design corrects vision irregularities that conventional lenses or glasses cannot address.
- Customisation:
Each pair is tailored to fit your eye’s unique shape, ensuring optimal comfort and performance.
- Versatility:
Scleral lenses can accommodate a wide range of conditions, making them suitable for complex cases that others cannot manage.
- Protection:
They offer a protective layer for damaged or sensitive corneas, creating a barrier against environmental irritants.
Essential Care for Scleral Lenses
To maximise the comfort, safety, and longevity of scleral lenses, proper care is non-negotiable. Here’s how you can care for your lenses effectively:
Daily Cleaning Routine
- Remove your lenses carefully to prevent scratching the surface.
- Use a designated cleaning solution to remove debris and protein buildup. Avoid using tap water, as it can introduce harmful microorganisms.
Proper Storage
- Store your scleral lenses in a clean lens case filled with fresh solution—either a prescribed cleaning/disinfection solution or as directed by your eye care provider.
- Replace the storage solution daily to minimise contamination risks.
Regular Maintenance
- Check the lenses regularly for scratches or deposits that may compromise their effectiveness.
- Schedule routine visits with your eye care provider to ensure the lenses still fit correctly and meet your needs.
Follow Professional Advice
- Always adhere to your optometrist’s recommendations regarding wear time, cleaning procedures, and replacement schedules. If you experience discomfort or vision changes, consult your provider immediately.
Is This the Right Option for You?
If you think scleral lenses might be your solution, consult an eye care specialist to determine their suitability for your needs. While they are customised and effective, they require dedication to a daily care routine and periodic replacements. Their non-permanent nature ensures that the lenses evolve with your eye health and lifestyle, offering unmatched flexibility and comfort.
Explore Alternatives
For those seeking permanent solutions, options such as corneal transplants or advanced surgical interventions might be worth exploring. However, these treatments involve significant recovery time and potential risks. Always weigh the benefits and drawbacks with a trusted medical professional.
Final Thoughts on Scleral Lenses
Scleral lenses are a temporary, adaptable solution that profoundly enhances vision and comfort for individuals with complex eye conditions. While they are not a permanent fix, their customisation and therapeutic benefits make them a leading choice for many.
Understanding their temporary nature and maintenance requirements is crucial for successful use. If you’re considering scleral lenses, consult with your optometrist to explore how they can transform your vision and quality of life.
