Are you aware of Scleral Lenses? Let's talk about these special lenses!

Are you a contact lens wearer? Or are you someone who wears glasses due to poor eyesight? We all know how common these are. But sometimes, there are more complex eye problems that cannot be solved with regular glasses or the soft contact lenses we all know. Today we are talking about a slightly different type of lens that comes to the rescue in such special cases. These are called Scleral Lenses.

Simply put, what are scleral lenses?

Scleral Lenses are also a type of contact lens that is worn on the eye. However, these are a little larger than the contact lenses we usually see. Think of it this way, while a regular contact lens is like a small saucer that only sits on the cornea of ​​the eye, a scleral lens is like a large saucer that covers the white part of the eye (sclera). That is why it is called 'Scleral'.

These are made from a material called 'Rigid Gas-Permeable' (RGP) . This means that these lenses are a bit thicker, they don't bend easily when you hold them, and they don't change shape. But what's also special is that oxygen gas can enter the eye through these lenses. This is very important for the health of the eye.

The most important thing here is that this lens does not touch the cornea directly. A small space is created between the lens and the cornea. Like a small bridge. When we put this lens on the eye, this space is filled with a special liquid ( saline solution). Then the cornea of ​​the eye is always moist and protected.

Why are scleral lenses used? Who is most important to them?

Ophthalmologists recommend these scleral lenses for a variety of eye diseases and conditions. They can be a godsend, especially for those who have difficulty achieving clear vision with regular glasses or lenses.

See the table below for what situations these are mainly used.

What are the advantages of using these lenses?

Scleral lenses have several advantages that make them different from other types of lenses.

• Very clear and sharp vision: Many people say that their vision is very clear and sharp when they wear these lenses. Some say that it feels like they are looking at a high-definition (HD) image.
• They don't fall out easily: Because these lenses are larger and their edges stay under the eyelid, they don't move or fall out like regular lenses. This makes them very comfortable, even for those who play sports.
• Greater eye protection: Since the lens covers a larger area, less dust and other objects enter the eye. It also provides better protection for a damaged cornea.
• Keeping the eye moist: As we discussed earlier, the fluid inside the lens keeps the eye moist. This is a great relief for those who suffer from dry eye disease.
• Some surgeries can even be postponed: For example, when Keratoconus is severe, surgery may be necessary. However, using scleral lenses can sometimes avoid or postpone the need for that surgery .

Are there any disadvantages? What are the challenges to be aware of?

Like everything, these lenses have their own set of drawbacks and challenges, but most of them are manageable.

• It takes time to get used to: Putting in, removing, and cleaning these lenses takes some getting used to. It can feel a little strange in the first few days. So your doctor will tell you to wear them for a few hours at first and then gradually increase the time.
• A little more expensive: Because these are specialized lenses and must be made to fit each individual, they are a little more expensive than regular contact lenses.
• Maintenance required: When worn throughout the day, small particles of dirt and dust can accumulate in the liquid inside the lens. This can cause a slight blurring of vision. Therefore, many people have to remove, clean, and reinsert their lenses at least once a day.
• It may take several tries to get the right fit: You may not be able to get the perfect fit right away. It may take two or three tries to get the perfect fit. This is normal, so don't worry.

How do you put these lenses in and take them out?

This is a little different than putting in a regular contact lens. But it's very easy once you get used to it. Your eye doctor will help you get used to it.

How to insert the lens into the eye

1. Wash your hands thoroughly: Always first wash your hands thoroughly with soap and then dry them with a clean cloth.

2. Fill the lens with solution: Hold the lens in your hand like a small cup and fill it with the recommended amount of saline solution (saline) until it is completely full. Do not overfill, as this can cause an air bubble to get trapped between the eye and the lens.

3. Hold the lens in the 'Tripod' position: If you are right-handed, balance the lens with the tips of the index finger, middle finger, and thumb of your right hand.

4. Lean forward: Lean forward so that your face is parallel to the ground. Tuck your chin into your chest. This is to keep the liquid in the lens from dripping.

5. Make the eye bigger: Pull the upper eyelid up with the index finger of your left hand. Pull the lower eyelid down with the middle finger of your right hand (the hand holding the lens).

6. Place the lens on your eye: Now slowly place the lens directly on your eye. Be careful not to spill any liquid. Once you feel the lens on the surface of your eye, remove the hand that was holding your upper eyelid. Then release your lower eyelid.

7. Check: Once the lens is properly seated on your eye, stand up straight. Check for air bubbles. If there are any, you will need to remove the lens again, refill the solution, and start over.

When should you see a doctor?

If you use scleral lenses, it is very important to follow your eye doctor's instructions and attend appointments on time. In addition, if you experience any of the following, tell your doctor immediately.

• If you notice a difference in the fit of the lens.
• If there is a change in the clarity of vision.
• If the lens is constantly moving around inside the eye.
• If you find it difficult to remove the lens.
• If you have persistent discomfort or pain in the eye.

Scleral Lenses, contact lens, eyesight, cornea, Keratoconus, eye diseases, dry eyes