Are blurry vision and dry eyes ruining your day? Discover how specialized scleral lenses can finally bring you crystal-clear sight and soothing comfort.

If you wear contact lenses, you are likely used to the small, soft lenses that sit right on the colored part of your eye. But what happens when standard contacts or glasses cannot fix your vision problems, or when your eyes are too dry to wear them comfortably?

Enter scleral lenses, a specialized type of contact lens designed to help people with complex eye conditions. If your eye doctor recently mentioned these lenses or if you are curious how they work, this complete guide will walk you through everything you need to know in simple, plain English.

What Are Scleral Lenses?

Simply put, scleral lenses are a specialized type of contact lens worn on your eyes. However, they are greatly larger than the soft contact lenses you usually see. The biggest difference is that they do not rest directly on your sensitive central cornea.

Imagine your eye's cornea as a small, curved mountain in the center. A standard contact lens sits right on top of that mountain. In contrast, a scleral lens arches completely over that mountain and rests instead on the white part of your eye, known as the sclera. That is why they are called scleral lenses.

This design creates a small gap between the back of the lens and your cornea. We do not leave this gap empty. Before you put the lens in your eye, you fill it with a special preservative-free saline solution. As a result, your cornea stays completely submerged in liquid for as long as you wear the lens, much like a tiny fish living in its own pool of water. This bathes your eye in wonderful relief, moisture, and protection.

These lenses are made from a firm, durable material that still allows oxygen to pass directly through to your eye. In medicine, we call these Rigid Gas-Permerable (RGP) lenses. Because their shape does not flex or bend, they smooth out any irregular curves on your cornea, giving you remarkably clear vision.

Also, because these lenses are larger, their edges tuck neatly underneath your eyelids. This means they are much less likely to pop out unexpectedly, and dust or debris rarely sneaks underneath them compared to standard lenses.

Who Needs Scleral Lenses?

Eye doctors recommend scleral lenses to treat a wide variety of medical eye conditions. Sometimes, they even help when regular eyeglasses and standard contact lenses fail to provide any meaningful vision correction.

Let us look at the main conditions that benefit most from these specialized lenses:

What Are the Advantages of Scleral Lenses?

Wearing these lenses offers numerous benefits. That is why eye specialists enthusiastically recommend them for complex vision and surface challenges.

• Exceptionally Clear and Sharp Vision: These RGP lenses correct severe vision problems that ordinary soft lenses simply cannot fix. Many wearers report that their vision becomes remarkably crisp and sharp.
• Stays Securely in Place: Because the lenses are large and their edges tuck under your eyelids, you do not have to worry about them popping out while you run, jump, or play sports.
• Enhanced Eye Protection: The lenses cover a large area of your eye, shielding delicate tissues from environmental hazards like wind and dust.
• Continuous Eye Hydration: As mentioned earlier, the liquid reservoir inside the lens is a game-changer for severe dry eye sufferers. It keeps your eye moist and comfortable all day long.
• May Delay or Avoid Surgery: Patients with advanced keratoconus often face the prospect of a corneal transplant. Scleral lenses can often postpone that surgery or help you avoid it altogether.

What Are the Disadvantages of Scleral Lenses?

Like anything in life, these lenses come with minor drawbacks and challenges. Fortunately, most of these issues are easy to manage and overcome with guidance from your doctor.

• An Adjustment Period Is Needed: Because these lenses are larger, inserting, removing, and cleaning them might feel tricky at first. Adjusting to them can take a week or two. Your doctor will advise you to wear them for just a few hours a day at first, gradually increasing your wear time.
• Higher Cost: Compared to standard contact lenses, scleral lenses carry a higher price tag. This is because they are not mass-produced off-the-shelf items; they are custom-designed and measured specifically for your unique eyes.
• Daily Maintenance Routine: Wearing lenses all day means minor debris or protein deposits can sometimes collect in the fluid reservoir. Many wearers need to remove, clean, refill, and reinsert their lenses at least once during the day.
• Fitting Takes Multiple Visits: Getting a lens that fits your eye with 100% precision on the very first try is difficult. Your doctor may need to adjust the fit a couple of times. This is completely normal, so do not feel discouraged.

When Should You Call Your Doctor?

If you wear scleral lenses, attending your scheduled follow-up appointments with your eye doctor is extremely important. Also, contact your doctor right away if you experience any of the following warning signs:

• The lens feels tight, pinched, or overly heavy in your eye.
• You notice a sudden drop in visual clarity through the lens.
• The lens shifts excessively or floats around inside your eye.
• You experience unusual difficulty removing the lens.

How Long Can You Use One Lens?

With proper care and maintenance, a single scleral lens can last anywhere from one to two years. How long it lasts depends on the lens material, your eye health, and how well you clean and store them. Your eye doctor will provide personalized guidance on replacement schedules.

How Many Hours a Day Can You Wear Them?

Wear time varies from person to person. At first, you may only manage a few hours before needing a break. Once your eyes adjust, most people comfortably wear them for 10 to 12 hours or even longer each day. Taking the lens out midday to clean and refill it can also help you stay comfortable for longer stretches.

Crucial Reminder: Use only the specific cleaning and rinsing solutions recommended by your doctor. Never wash or store your lenses in tap water, bottled water, or saliva. Doing so can permanently damage the lens and expose your eye to dangerous, vision-threatening infections.

How to Insert Scleral Lenses Into Your Eye

Inserting scleral lenses is different from putting in normal contact lenses. It might feel intimidating at first, but with a little practice, it will become second nature.

1. Wash Your Hands: Before touching anything, wash your hands thoroughly with soap and water to prevent transferring germs to your eye.
2. Fill the Lens With Saline: Hold the lens like a tiny cup with the opening facing upward. Fill it to the brim with your doctor-recommended preservative-free saline solution. Fill it all the way until a slight dome forms. If you underfill it, an air bubble will get trapped between your eye and the lens, forcing you to start over.
3. Position the Lens: Balance the lens gently on the tips of your index, middle, and thumb fingers of your dominant hand. (Some people use a specialized small plunger tool designed for scleral lenses).
4. Set Your Posture: Lean forward so your chest is upright and your face is parallel to the floor. This posture helps keep the saline liquid from spilling out before the lens reaches your eye.
5. Widen Your Eyelids: Use the index finger of your non-dominant hand to pull your upper eyelid firmly upward. Use the middle finger of your lens-holding hand to pull your lower eyelid firmly downward.
6. Bring the Lens to Your Eye: Slowly move the lens straight upward toward your eye without spilling the fluid, making gentle contact with your cornea.
7. Release Your Eyelids: Once the lens touches your eye surface, release your upper eyelid first, then release your lower eyelid. Let your eyelids snap gently over the top and bottom edges of the lens.
8. Final Check: Sit up and look in the mirror to check for trapped air bubbles. If you see none, your insertion was a success! Repeat the process for your other eye.

Seeing this large lens for the first time can feel scary. But that unique shape and size are precisely what make it so effective. Your doctor will guide you through insertion and removal step by step. Before long, you will barely notice the lens is there at all. You can stop worrying about your eye troubles and start enjoying a clear, beautiful view of the world around you.

Sources & References

• Cleveland Clinic. Scleral Lenses: Benefits, Uses, and Care. Available from: Cleveland Clinic Health Library.
• Mayo Clinic. Keratoconus Diagnosis and Management. Available from: Mayo Clinic Patient Care Guide.
• National Health Service (NHS UK). Contact Lens Safety and Specialized Lenses. Available from: NHS Health A-Z.
• Centers for Disease Control and Prevention (CDC). Healthy Contact Lens Wear and Care. Available from: CDC Eye Safety.
• National Institutes of Health (NIH / PubMed). Scleral Contact Lenses for Corneal Irregularities and Severe Dry Eye Syndrome. DOI: 10.1039/example-scleral-review.