Lens Replacement

Izmir Kaşkaloğlu Eye Hospital

Lens replacement - Refractive Lens Exchange (RLE) with Trifocal or EDOF intraocular lenses

**Refractive Lens Exchange (RLE): An Ideal Vision Correction Option**

If you are looking for an alternative to wearing glasses and LASIK isn’t suitable for you, Refractive Lens Exchange (RLE) might be the ideal solution. Unlike LASIK and other refractive surgeries that reshape the cornea, RLE corrects your vision by altering the focusing power of your eye through the replacement of your natural lens with a new intraocular lens (IOL).

**Eligibility and Personalized Treatment**

It’s important to note that not everyone who wears glasses is a suitable candidate for RLE. A detailed eye examination will determine your eligibility for the lens exchange operation. Once confirmed as a suitable candidate, we will replace your natural lens with an IOL specifically chosen to optimize your vision needs.

**Ideal for Individuals Over 40**

RLE is particularly well-suited for individuals over 40, as this is typically when the ability to focus up close begins to decline due to the natural lens becoming less flexible. Reading glasses or bifocals are often required for close work, making RLE a beneficial vision correction option.

**State-of-the-Art Technology for Precision**

At our Kaskaloglu Eye Hospital, we prioritize precision and safety during the RLE procedure. We utilize advanced technologies such as ZEISS IOLMASTER 700 for calculating IOL power, Pentacam for assessing corneal surface and thickness, and I-Trace to customize the operation further. The Alcon LenSx Femtosecond laser is employed for several steps during the surgery, enhancing precision and safety.

**Minimally Invasive and Quick Procedure**

On the day of the surgery, we administer drops to dilate the pupil, and the operation is conducted under topical anesthesia, meaning no injections are necessary. The natural lens is removed using laser and sound wave energy through a tiny incision, eliminating the need for stitches. The entire surgery usually takes less than 10 minutes, allowing patients to return home shortly after the procedure.

**Premium Intraocular Lenses for Superior Vision**

We use premium intraocular lenses from top companies such as Alcon, Zeiss, Johnson & Johnson, Rayner, or SAV (Swiss Advanced Vision). This ensures our patients experience excellent post-operative vision.

**Contact Us**

To determine if you are a suitable candidate for RLE or other refractive procedures, please contact us at Kaskaloglu Eye Hospital. However, keep in mind that the information provided here does not replace the advice of an experienced doctor specialized in lens replacement surgery.

**Expert Eye Surgeons**

Rest assured that our eye doctors have extensive surgical experience, ranging from 17 to 42 years at the time of this page update. You can trust our skilled professionals to provide the highest level of care and expertise during your RLE journey.

Below you can read more information about this operation:

The lens exchange for presbyopia is often referred to as “Refractive Lens Exchange” (RLE) or “Clear Lens Exchange” (CLE). It’s a surgical procedure where the eye’s natural lens is replaced with an artificial intraocular lens (IOL) to correct presbyopia and, in many cases, other refractive errors like myopia, hyperopia, and astigmatism.

 1. Procedure:

– Step 1: A small incision is made on the cornea.

– Step 2: The natural lens of the eye is gently broken up using ultrasound (this technique is called phacoemulsification).

– Step 3: The lens fragments are then removed from the eye.

– Step 4: An artificial IOL is inserted in place of the natural lens.

 2. Types of IOLs for Presbyopia:

– Monofocal IOLs: These lenses have one point of focus and can usually correct distance vision. Reading glasses may still be necessary for near tasks.

– Trifocal IOLs: These provide multiple points of focus. They allow for clear vision at multiple distances (near, intermediate, and far).

– Extended Depth of Focus (EDOF) IOLs**: These lenses provide a continuous range of vision, from distance to near, rather than distinct points of focus.

 3. Benefits of RLE for Presbyopia:

– Reduces or eliminates the need for reading glasses or bifocals.

– Can address other refractive errors simultaneously.

– The procedure is very similar to cataract surgery, a well-established and safe surgical procedure.

– Once done, you won’t develop a cataract in the future since the natural lens has been replaced.

 4. Risks and Complications:

While RLE is generally considered safe, like any surgical procedure, it carries certain risks:

– Retinal  detachment

– Infection


– Glare orhalos around lights

– Incorrect lens power, leading to the need for glasses or additional surgery

– Loss of vision in rare cases

 5. Considerations Before Opting for RLE:

– It’s irreversible. Once the natural lens is removed, it can’t be put back.

– It’s often considered a cosmetic procedure, so many insurance companies don’t cover
the cost.

– One should carefully weigh the risks and benefits, and discuss in-depth with an ophthalmologist.

 6. Recovery:

The recovery from RLE is relatively quick. Most patients notice an improvement in their vision within a day or two. However, it may take a few weeks for the vision to stabilize and for any post-surgical side effects (like halos or glare) to diminish.

 It’s important to consult with an ophthalmologist or a refractive surgeon to determine if you’re a good candidate for RLE and to discuss which type of IOL would be most appropriate for your individual needs.

What is the difference between trifocal and EDOF intraocular lenses?

Trifocal and Extended Depth of Focus (EDOF) intraocular lenses (IOLs) are both advanced options used in cataract surgery or refractive lens exchange to address presbyopia and other refractive errors. They provide a broader range of vision
compared to traditional monofocal IOLs. Here are the primary differences between them:

 1. Mechanism of Action:

 – Trifocal IOLs:

  – As the name suggests, trifocal IOLs have three distinct focal points: near, intermediate, and distance vision.

  -They achieve this by splitting light that enters the eye into these three focal points.

  -The design of these lenses aims to offer clear vision at all three distances without the need for additional glasses.


  -EDOF lenses use a unique design or optical technology to extend the range of clear vision. Instead of distinct focal points like trifocal or bifocal IOLs, they provide a continuous range of focus.

  -The idea is to offer smoother transitions between different viewing distances, from distance to intermediate and closer to near. 

2. Visual Outcomes: 

– Trifocal IOLs:

  -Generally offer clear vision at three defined distances.

  -Some patients may still experience zones of blur between the specific focal


  -Aim to reduce zones of blur and offer a more continuous range of clear vision.

  -However, the very closest near vision (like fine print reading) might not be as sharp as with trifocal lenses, and some patients might need reading glasses for very detailed close-up tasks.

 3. Side Effects and Visual Disturbances:

 – Both lens types can potentially produce visual disturbances such as halos and glare, especially in low-light conditions. However, the nature and frequency of these disturbances can vary based on the specific lens design and the individual patient.

 – Some users report fewer night-time disturbances with EDOF lenses compared to trifocal IOLs, but this is subjective and can vary from person to person.

 4. Suitability:

 – The ideal choice between trifocal and EDOF IOLs depends on individual patient needs, their lifestyle, and specific visual requirements.

 – For instance, someone who does a lot of reading or detailed near work might prefer the near vision clarity of trifocal lenses. In contrast, someone looking for a smoother transition between different visual distances might opt for an EDOF lens. 

In conclusion, while both trifocal and EDOF IOLs represent advancements over traditional monofocal lenses, the best choice depends on individual preferences and needs. It’s essential to have a thorough discussion with an ophthalmologist
to determine the most appropriate lens option.



Son Güncelleme 20 September 2023 Saat 12:15 pm