Smart Lenses: Say Goodbye to Glasses and Contact Lenses!

Being able to see clearly at every distance without glasses or contact lenses is no longer just a dream, thanks to advancing medical technologies. The simplest answer to the question "What is a smart lens?" is that they are permanent artificial intraocular lenses (IOLs) implanted in the eyes of individuals with cataracts or those who have lost their near vision after the age of forty, providing clear sight at far, intermediate, and near distances. With this advanced technology, you can continue your daily life much more comfortably, free from the dependence on glasses.

• The procedure takes an average of 15-20 minutes per eye and is usually performed painlessly with anesthetic eye drops.
• Thanks to their trifocal (three-focal) structure, they provide clarity at far, intermediate (computer distance), and near (reading distance) ranges.
• The lenses implanted after surgery remain in the eye for a lifetime; they do not deteriorate or need to be replaced over time.
• They are frequently applied to cataract patients and individuals over 40 experiencing presbyopia (near vision problems).
• The recovery process is quite fast; patients can usually return to their daily routines the day after the procedure.

What is an Intraocular Smart Lens?

Inside the human eye, there is a natural lens that works much like a camera lens. Quite flexible in our younger years, this lens changes shape to focus when looking far away or up close. However, as we age—especially after forty—this natural lens begins to lose its flexibility, leading to difficulty seeing up close (presbyopia). At older ages, this lens loses its transparency and develops into a cataract.

The intraocular smart lens procedure involves removing this dysfunctional natural lens using ultrasonic sound waves and replacing it with an artificial, multifocal lens. Referred to in medical literature as multifocal or trifocal lenses, they are popularly known as "smart lenses" due to the high visual quality they provide. Once implanted, these lenses are unnoticeable from the outside and do not create any sensation of a foreign body in the eye.

Who is a Candidate for Smart Lenses and What are the Risk Factors?

Smart lens surgery can be successfully performed on a wide group of patients with suitable eye structures. The primary candidates are individuals over the age of forty who experience far or near vision problems and no longer wish to wear glasses. It is also one of the most ideal permanent treatment methods for patients with early-stage or fully developed cataracts.

Patients with high prescriptions for myopia, hyperopia, or astigmatism whose corneal thickness is not suitable for laser eye surgery (LASIK or PRK) can also achieve clear vision with smart lens treatment. However, a detailed eye examination is mandatory to determine if a patient is suitable for this procedure. Smart lenses are generally not recommended for patients with chronic conditions affecting the eye's nerve layer or cornea, such as macular degeneration, advanced glaucoma, diabetic retinopathy, or corneal dystrophy. In such cases, your doctor will recommend alternative lens options or treatment methods.

The Difference Between Monofocal and Trifocal Lenses

During cataract or refractive lens exchange surgeries, different types of lenses can be chosen based on the patient's eye structure and lifestyle. The two most common options at this stage are monofocal (single-focus) and trifocal (three-focus) lenses.

Monofocal lenses provide clear vision at only one distance. They are usually set to sharpen distance vision. A patient with a monofocal lens will not need glasses while watching television or driving, but they will absolutely need to wear reading glasses to read a book, look at a smartphone screen, or use a computer.

Trifocal lens surgery, on the other hand, offers the patient independence across three different focal points. Trifocal lenses feature special concentric rings designed into the lens. These rings distribute light to far (driving, cinema), intermediate (computer screens, car dashboards, kitchen counters), and near (reading, smartphone use) distances, ensuring clarity in every area. Especially in today's digital age, where intermediate distance (about 60-80 cm) is of great importance, trifocal lenses offer a much more advantageous and comfortable experience compared to monofocal lenses.

Pre-Surgery Preparation and the Surgical Process

The first step to a successful outcome is highly meticulous pre-operative measurements. The eye's corneal map is drawn, pupil diameter is measured, and the exact power of the lens to be implanted is calculated down to the millimeter using advanced biometry devices. During this stage, your doctor will also evaluate details such as your profession, daily habits, and whether you frequently drive at night.

Smart lens surgery is typically performed using a modern surgical technique called phacoemulsification (Phaco). Before the procedure, the eye is completely numbed with special drops, ensuring the patient feels no pain or aching during the surgery. A micro-incision of about 2 to 2.5 millimeters is made in the cornea, and the natural lens is fragmented with ultrasonic waves and vacuumed out. Then, the foldable smart lens is injected into the eye using a special delivery device. Unfolding inside the eye, this lens fits perfectly into the natural lens capsule. Because the incision is so small, it does not require stitches and heals on its own. The procedure can be done on different days for each eye, or, if the physician deems it appropriate, on the same day or a few days apart.

Smart Lens Surgery Recovery Process

The recovery process after smart lens surgery is one of the most frequently asked questions by patients. Immediately after the surgery, the eye is covered with a protective shield, and the patient is discharged the same day. During the first check-up the following day, the shield is removed, and the patient begins to see on their own. It is perfectly normal to experience mild blurred vision, stinging, watering, or sensitivity to light for the first few days.

The most critical point during the recovery process is to use the antibiotic and cortisone eye drops prescribed by your doctor exactly on time and without skipping doses. For the first week, water should not enter the eye, the eyes must absolutely not be rubbed, and heavy physical activities should be avoided. There is a process called neuroadaptation, where the brain gets used to the working principle of trifocal lenses. As the brain learns to process the simultaneous far, intermediate, and near images, halos or glares around lights may be seen at night, especially in the first few weeks. This situation generally diminishes and disappears within a few months as the brain adapts to the new optical system.

How are Smart Lens Prices Determined?

As with any permanent procedure in the healthcare field, the answer to how smart lens prices are determined depends on multiple variables. The most fundamental factor affecting pricing is the brand, technology, and quality of the lens to be used. Trifocal lenses manufactured from high-quality materials with American Food and Drug Administration (FDA) or European standards (CE) approval have a different cost structure compared to standard monofocal lenses.

In addition, the technological infrastructure of the hospital where the surgery will be performed, the quality of the surgical microscopes and phaco machines used, operating room sterilization standards, and the experience of the performing surgeon are also decisive factors in pricing. Considering that these lenses will remain in your eye for a lifetime and that your vision quality will affect your entire life, it is clear that the reliability of the materials used is a health investment that should be prioritized far above the cost.

Eye Health and Headaches: Do Not Confuse the Symptoms

Vision disorders are not limited to blurred vision; they can also lead to severe headaches and pain around the eyes. A change in your glasses prescription or a hidden hyperopia/astigmatism problem can tire your eye muscles throughout the day, triggering a headache. For more detailed information on this topic, you can read our article titled Not Every Headache is Stress: Your Eyes Might Be Sending a Signal!

Sometimes patients visit an ophthalmologist mistaking pressure and pain around the eyes for eye pressure (glaucoma) or a vision disorder. However, an examination might reveal that their eye health is perfectly fine, and the problem actually stems from chronic sinusitis. Pain radiating behind the eyes, combined with nasal congestion and post-nasal drip, points to sinus infections. To make this distinction correctly, it will be helpful to take a look at our article That Lingering Cold Might Be Sinusitis: Symptoms and Treatment.

When to See a Doctor?

Although the risk of complications after smart lens surgery is low, as with any surgical procedure, there are risks such as infection or increased intraocular pressure. If you experience any of the following symptoms, you should contact your doctor without delay or go to the emergency room of a fully equipped hospital:

• Severe eye pain that appears suddenly after surgery and does not subside with painkillers.
• A sudden decrease in vision, blackouts, or total loss of vision.
• Intense redness, swelling, and yellow/green purulent discharge in the eye.
• Intense black spots suddenly appearing in front of the eye, floating objects, or a sensation of flashing lights (this can be a sign of a retinal tear).
• Distortion in the shape of the pupil or severe light sensitivity.

In such emergencies, you can call 112 or visit our 24/7 emergency department.

The Process and Multidisciplinary Approach at BHT CLINIC

At BHT CLINIC İstanbul Tema Hastanesi, we focus on protecting your eye health with the most advanced technological devices and our team of experienced physicians. In smart lens surgery, every step is carried out with great meticulousness, from detailed pre-operative eye mapping to the post-operative follow-up process. In our hospital's JCI (Joint Commission International) accredited sterile operating rooms, safe surgical opportunities are provided by minimizing the risk of infection.

In cases where complaints such as pain around the eyes, headaches, or sleep problems can be confused with one another, the strong interdepartmental communication at our hospital comes into play. If your eye examination reveals that the problem originates from the sinuses or upper respiratory tract, your process is rapidly managed in coordination with the specialists in our Ear, Nose, and Throat (ENT) Diseases department. To book an appointment and get a detailed examination, you can visit our appointment page or contact us through our 24/7 call center at 0850 811 34 00.

Frequently Asked Questions

How long does smart lens surgery take?

The surgery is generally completed in an average of 15 to 20 minutes for each eye. Including the pre-operative preparation and the numbing process with drops, your stay at the hospital may take a few hours.

Will my eye prescription increase again after a smart lens is implanted?

No, your eye prescription will not increase again after smart lens surgery. The artificial lenses placed inside the eye are permanent for life, and refractive errors (myopia, hyperopia, astigmatism) are permanently corrected.

Is trifocal lens surgery a painful procedure?

Thanks to the special anesthetic drops applied to the eye before the procedure, the surgery is completely painless. Patients may only feel a slight touching or pressure sensation during the operation.

Do smart lenses correct astigmatism?

Yes, there are 'toric' smart lenses specifically manufactured for patients with astigmatism. Thanks to these lenses, both far-near vision problems and astigmatism can be corrected in a single surgery.

Can I drive at night after the surgery?

It is normal to see halos or reflections around lights in the first few weeks after surgery. Once the brain's process of adapting to the new lens (neuroadaptation) is complete, patients can continue driving at night without any problems.

This article is for informational purposes only; please consult your physician for diagnosis and treatment.