Phakic Intraocular Lens Surgery
Understanding Phakic Intraocular Lens Surgery
A phakic intraocular lens is a tiny, clear implant that we place inside your eye to correct your vision. The word phakic means your natural lens stays in your eye, so this artificial lens works together with the lens you were born with. Think of it like adding a permanent contact lens inside your eye that bends light rays so they focus correctly on your retina.
We position the phakic IOL either just in front of your iris or just behind it, depending on which type we choose for your unique eye anatomy. Once in place, the lens remains stable and does most of the work to correct your refractive error.
LASIK and similar laser procedures permanently reshape your cornea by removing tissue. Phakic IOL surgery does not alter the structure of your cornea, which makes it a better option if your cornea is too thin or your prescription is too high for laser correction. Your cornea is largely preserved aside from a small incision. We also preserve your ability to focus at different distances naturally, at least until age-related changes occur.
- Phakic IOLs can correct much higher prescriptions than LASIK typically can
- The procedure is reversible because we can remove or exchange the lens if needed
- Because the corneal incision is small and there is no corneal flap or surface ablation, corneal healing is typically quick, although the inside of the eye still needs time to settle
- Does not treat presbyopia; you may still need reading glasses as you age
- Halos and glare at night can occur with any refractive procedure, including phakic IOLs
Alternatives include LASIK, PRK, SMILE, and refractive lens exchange. We discuss the pros and cons of each based on your prescription, corneal thickness, age, and eye health.
- LASIK: quick recovery; requires adequate corneal thickness
- PRK: suitable for thinner corneas; longer surface healing
- SMILE: small-incision corneal procedure; range limits apply
- Refractive lens exchange: often preferred for higher hyperopia or early lens changes; removes natural accommodation
- Contact lenses and glasses remain safe, non-surgical options
We look for patients who are at least 21 years old with a stable eyeglass prescription that has not changed significantly in the past year. Your eyes must be healthy, with no history of glaucoma, cataracts, or certain retinal conditions. Adequate space inside your eye is essential so the implant will not touch other structures.
- Not pregnant and not breastfeeding at the time of surgery
- Adequate anterior chamber depth per lens labeling; your surgeon will confirm minimum depth
- Sufficient corneal endothelial cell density for your age; measured by specular microscopy
- Open angles without narrow-angle anatomy
- No active eye inflammation or uncontrolled glaucoma
You may be an excellent candidate if you have moderate to severe nearsightedness, farsightedness, or astigmatism that exceeds the safe limits for laser vision correction. We will measure your anterior chamber depth and confirm your corneal endothelial cell density meets age-appropriate safety thresholds during your consultation to confirm this surgery is right for you.
Phakic IOLs are most commonly used to treat high myopia, or severe nearsightedness, when laser procedures would remove too much corneal tissue. We can also address moderate to high hyperopia, or farsightedness, and certain levels of astigmatism with specialized toric phakic lenses. The range of correction available depends on the specific lens model and your eye anatomy.
Patients often considered are those with higher myopia, commonly above about negative 8 diopters, or prescriptions outside safe ranges for corneal laser correction. Availability for hyperopia varies by region and lens model; we will advise you based on local approvals.
We may recommend a phakic IOL if your cornea is not thick enough to safely undergo LASIK or PRK. These procedures require removing corneal tissue, and if your cornea is already thin or you have a very high prescription, we risk weakening the cornea or causing visual problems. Phakic IOLs bypass this concern entirely. Large pupils can increase the risk of night halos with any refractive procedure; lens design and sizing can help mitigate this.
- Your prescription may be too strong for laser surgery to correct fully
- Your corneal shape or thickness may fall outside safe limits for ablation
- You want a reversible option that preserves your natural eye structure
Pre-Surgery Evaluation: What to Expect
Before scheduling your surgery, we perform a complete eye exam to assess every aspect of your vision and eye health. This includes checking your current prescription, measuring your visual acuity, and examining the front and back of your eyes with specialized instruments. We also test your eye pressure and look for any signs of disease that could affect surgical outcomes.
Precise measurements are critical because the phakic IOL must fit properly inside your eye. We measure the curvature of your cornea, the length of your eye, and the size of your pupil in different lighting conditions to select the best lens power and design for you. If you wear contact lenses, you will need a contact lens holiday before final measurements to avoid corneal warpage.
We use advanced imaging technology to map the internal structures of your eyes. Optical coherence tomography, or OCT, gives us detailed cross-sectional images of your retina and the space where the phakic IOL will sit. Ultrasound biomicroscopy helps us measure the anterior chamber depth and angle structures with great accuracy.
- Corneal topography maps the surface shape of your cornea
- Specular microscopy counts the endothelial cells that keep your cornea clear
- Sizing and power selection use your refraction, white-to-white or sulcus measurements, and other anatomy to choose lens power and size
- Anterior segment imaging evaluates the space available for the implant
- White-to-white or sulcus-to-sulcus measurements help select lens size for proper vault
We review your complete medical and eye history to identify any conditions that might affect your surgery or healing. Autoimmune disorders, uncontrolled diabetes, or a history of eye inflammation may require additional management before we proceed. We also ask about any medications you take, including supplements, because some can increase bleeding or affect healing.
Certain eye conditions can disqualify you from phakic IOL surgery or require treatment first. We screen carefully for glaucoma, cataracts, retinal disease, and corneal problems to ensure your eyes are healthy enough for an implant.
To ensure accurate measurements and sizing, stop contact lenses before your final testing.
- Soft lenses: typically 3 to 7 days
- Rigid gas permeable or scleral lenses: 2 to 4 weeks or until topography is stable
- Your surgeon will tailor these timelines to your lens type and corneal stability
During your consultation, we talk about what you hope to achieve with phakic IOL surgery and whether those goals are realistic. Many patients achieve very good distance vision without glasses, but you may still need reading glasses as you get older due to natural age-related changes in focusing ability. We want you to have a clear understanding of what the surgery can and cannot do.
We also discuss lifestyle factors like your occupation, hobbies, and visual demands. If you spend long hours on computers or do detailed close work, we tailor our recommendations to help you achieve the best possible functional vision for your daily activities.
Several phakic IOL designs are available in 2025, and we select the one that best matches your eye anatomy and refractive error. Posterior chamber phakic IOLs sit behind the iris and in front of your natural lens, while anterior chamber models rest in front of the iris. Each design has specific advantages depending on your anterior chamber depth and angle structures.
- Posterior chamber lenses often provide better stability and less risk to the cornea compared to older angle-supported anterior chamber designs
- Toric models can correct astigmatism along with nearsightedness or farsightedness
- Lens size must match your eye dimensions to avoid touching the iris or natural lens
- Many modern posterior chamber lenses have a central port, so routine preoperative laser iridotomies are not needed
- Angle-supported anterior chamber lenses are rarely used today due to higher endothelial cell loss risk
- Sizing is based on your eye's dimensions to achieve proper vault between the implant and your natural lens
The Phakic IOL Surgical Procedure
We provide detailed instructions about what to do before your procedure. You will need to arrange for someone to drive you home because your vision will be blurry and you cannot drive after surgery. We may ask you to stop certain medications temporarily and to avoid wearing eye makeup or using lotions on your face the day of surgery.
On surgery day, plan to be at our facility for several hours even though the actual procedure is quick. You can eat a light meal beforehand unless we instruct you otherwise, and wear comfortable clothing that does not need to be pulled over your head.
- Do not wear eye makeup on surgery day and for 1 week afterward
- Avoid facial lotions and perfumes on surgery day
- Arrange for a driver; do not drive until we confirm it is safe at a follow-up visit
Phakic IOL surgery is performed using numbing eye drops, so you remain awake but feel no pain in your eye. We may also offer a mild sedative to help you relax if you feel anxious. You will lie comfortably on a reclining surgical chair, and we use a device to gently hold your eyelids open so you do not need to worry about blinking.
Throughout the procedure, we talk to you and let you know what to expect at each step. Most people do not feel pain; pressure or brief discomfort can occur. The numbing drops are very effective and we add more if needed.
We begin by making a tiny incision in your cornea, usually less than 3 millimeters wide. Through this opening, we carefully insert the folded phakic IOL into your eye using a specialized injector. Once inside, the lens gently unfolds and we position it precisely in the correct location, either in front of or behind your iris depending on the lens type.
- A viscoelastic gel is placed in the eye to protect tissues and is removed at the end to reduce the risk of a pressure spike
- For lens models that require it, laser iridotomies may be performed before surgery to maintain fluid flow
- The lens is centered and adjusted to ensure it sits in the ideal position
- We confirm the implant is stable and not touching other eye structures
- For toric lenses, we align the implant with premarked axes to correct astigmatism
- The tiny incision usually seals on its own without stitches
- We place antibiotic and anti-inflammatory drops in your eye before you leave
The actual surgical implantation typically takes about 15 to 30 minutes per eye. Some centers perform both eyes the same day; others stage surgery one to two weeks apart. This allows the first eye to heal and lets us assess the result before proceeding with your second eye.
Although the surgery itself is quick, you should expect to spend two to three hours at our facility for preparation, the procedure, and initial recovery monitoring. We want to make sure you are comfortable and your eye is stable before you go home.
Right after surgery, we place a protective shield over your eye and give you dark sunglasses to wear. Your vision will be blurry at first, and you may notice some light sensitivity or mild irritation. We monitor you for a short time to ensure your eye pressure is normal and there are no immediate concerns.
Before you leave, we provide detailed written instructions about using your eye drops, protecting your eye, and what symptoms are normal versus those that require immediate attention. We also schedule your first follow-up appointment, usually for the next day, so we can check your healing progress.
Recovery and Life After Phakic IOL Surgery
During the first day after surgery, your eye may feel scratchy or mildly irritated, similar to having an eyelash in your eye. You might notice watering, light sensitivity, and fluctuating vision as your eye begins to heal. These symptoms are normal and typically improve quickly. We recommend resting with your eyes closed as much as possible and avoiding any activities that could bump or put pressure on your eye.
- Wear your protective eye shield while sleeping to prevent accidental rubbing
- Use prescribed eye drops exactly as directed to prevent infection and reduce inflammation
- Avoid getting water directly in your eye when washing your face
- Do not rub or touch your eye even if it feels irritated
- If you develop a severe headache with nausea and see halos, call us immediately; this can be a sign of high eye pressure
You can usually return to most normal activities within a few days, but we ask you to avoid strenuous exercise, heavy lifting, and swimming for at least two weeks. Contact sports and activities with a high risk of eye injury should be avoided for at least a month. You can watch television, use a computer, and read as soon as you feel comfortable, though your vision may still be adjusting.
Most patients can return to work within a few days if their job does not involve heavy physical labor or exposure to dust and chemicals. We provide specific guidance based on your occupation and the healing progress we observe at your follow-up visits.
- Avoid swimming pools, hot tubs, and underwater submersion for 2 weeks
- Avoid eye makeup for 1 week
- Avoid dusty or dirty environments for the first week
- Do not play contact sports for at least 4 weeks; wear protective eyewear when you return
After surgery, we prescribe antibiotic eye drops to prevent infection and anti-inflammatory drops to control swelling and promote healing. You will need to use these drops several times a day for about one to four weeks, following a specific schedule we provide. Some patients also use lubricating drops to relieve dryness and improve comfort.
It is very important to use your drops exactly as prescribed and to wash your hands before touching the bottle or your eye area. We show you the proper technique for instilling drops and answer any questions you have about your medication regimen.
- Steroid drops are usually tapered over several weeks; follow your schedule closely
- Some patients may need temporary eye pressure lowering drops if pressure rises
We see you the day after surgery to check your vision, eye pressure, and the position of your new lens. Additional visits are scheduled at one week, one month, three months, and six months to monitor your healing and visual outcome. At each visit, we examine your eye carefully and make sure the phakic IOL remains in the correct position.
- We measure your vision to track improvement and stability over time
- Eye pressure checks ensure you are not developing elevated pressure
- We examine the implant and surrounding structures for any signs of problems
- Your prescription is refined once your vision has fully stabilized
- We assess lens vault using the slit lamp or anterior segment imaging to ensure it is within a safe range
- Visit frequency may increase if eye pressure is high, vault is suboptimal, or inflammation persists
Once your eye has healed, you should continue to have regular comprehensive eye exams at least once a year. We monitor the health of your cornea, the position of the phakic IOL, and watch for any age-related changes like cataract development. Wearing sunglasses with ultraviolet protection helps safeguard your eyes from sun damage.
Protecting your eyes from injury is important because you have an implant inside. We recommend wearing protective eyewear during sports and activities where eye injury could occur. If you ever experience new symptoms like pain, redness, flashing lights, or a sudden decrease in vision, contact our office immediately.
- Annual specular microscopy to track corneal endothelial cell density; more frequent if there is accelerated cell loss
- Periodic retinal evaluation is recommended for highly myopic eyes
Potential Risks and When to Seek Urgent Care
In the first few weeks after surgery, many patients notice glare or halos around lights, especially at night. Your eyes may feel dry or slightly irritated, and your vision may fluctuate as your eye adjusts to the new lens. These symptoms usually diminish as healing progresses and are not cause for alarm.
Mild light sensitivity and the sensation of something in your eye are also common and temporary. Using your prescribed lubricating drops and wearing sunglasses outdoors can help manage these minor discomforts until they resolve on their own.
Although phakic IOL surgery is generally safe, serious complications can occur. Elevated eye pressure that does not respond to medication may develop and require additional treatment. The implant could shift out of position, touch your natural lens and cause early cataract formation, or cause damage to the corneal cells that keep your cornea clear.
- Infection inside the eye is rare but requires immediate aggressive treatment
- Inflammation that persists or worsens may indicate a problem with the implant
- Pupillary block or acute angle closure, which can present with headache, halos, nausea, and eye pain
- Pigment dispersion or iris chafe, which can raise eye pressure
- Cystoid macular edema causing blurred or distorted central vision
- Hyphema, or bleeding in the front of the eye
- Toric lens rotation or decentration that can blur vision and may require repositioning
- Improper vault, either too low with cataract risk or too high with angle crowding
- Retinal detachment is a rare but serious risk that requires urgent surgical repair
- Loss of corneal endothelial cells over time can lead to corneal swelling and vision loss
High myopia carries a baseline risk of retinal detachment independent of surgery; we review symptoms and monitor accordingly.
Contact us immediately if you experience sudden vision loss, severe eye pain that is not relieved by over-the-counter pain medication, or a significant increase in redness. New floaters, flashing lights, or a curtain or shadow in your peripheral vision can signal retinal problems that need urgent evaluation. Any discharge, especially if thick or colored, may indicate infection.
If you notice a sudden increase in light sensitivity, see double images, or feel like your implant has moved, do not wait for your next scheduled appointment. These symptoms require prompt assessment to prevent potential complications and protect your vision.
- Severe headache with nausea and rainbow halos around lights
- Sudden loss of side vision or a curtain-like shadow
Over the years, we continue to monitor you for gradual loss of corneal endothelial cells, which can happen slowly with any phakic IOL. Significant cell loss may eventually cause corneal swelling and require removal of the implant. We also watch for cataract development, which can occur naturally with age but may happen earlier if the phakic IOL touches your natural lens. If endothelial cell loss progresses beyond safe limits, removal of the implant may be recommended to protect the cornea.
Regular annual exams allow us to detect these changes early and intervene if necessary. Some patients may need the phakic IOL removed or replaced years after surgery, or may eventually undergo cataract surgery when their natural lens becomes cloudy. Ongoing monitoring ensures we catch any issues before they affect your vision significantly.
Frequently Asked Questions
Yes, one of the advantages of phakic IOL surgery is that the lens can be removed if necessary. We can take out the implant if you develop complications, if your prescription changes significantly, or if you need cataract surgery later. Removal or exchange is usually feasible, but vision may not return exactly to preimplant status; changes such as endothelial cell loss, cataract, or iris alterations can persist.
Phakic IOLs primarily correct distance vision, so if you are over 40, you will likely still need reading glasses for close tasks due to presbyopia, the natural age-related loss of near focusing. Younger patients may retain their ability to focus at all distances for several years until presbyopia develops. Phakic IOLs preserve your natural focusing ability, but presbyopia still develops with age. We can discuss options for managing near vision based on your age and lifestyle.
Phakic IOLs are designed to be permanent and can last for many years or even decades. However, they may need to be removed or replaced if complications arise or if your eyes change over time. Longevity depends on eye health, endothelial cell trends, and appropriate vault; ongoing monitoring is essential. With proper monitoring and care, most patients enjoy long-term vision correction from their phakic IOLs without needing additional procedures.
Absolutely. If you develop cataracts in the future, we can remove both the phakic IOL and your cloudy natural lens during cataract surgery, then replace them with a standard intraocular lens. This is a routine procedure, and having a phakic IOL now does not prevent you from receiving excellent cataract care later in life.
The surgery itself is not painful because we use numbing drops that completely anesthetize your eye. You may feel slight pressure or be aware of instruments near your eye, but you should not experience sharp pain. After surgery, mild discomfort or irritation is common for a day or two, but this is usually manageable with over-the-counter pain relievers and typically resolves quickly.
Many patients notice clearer vision within the first day after surgery, although your vision may still be somewhat blurry or fluctuate initially. Over the next few days to weeks, your vision continues to improve as your eye heals and adjusts to the implant. Most people achieve their best vision within one to three months, once all swelling has resolved and the eye has fully stabilized.
Getting Help with Phakic IOL Surgery
If you are considering phakic IOL surgery or want to learn whether you are a good candidate, we encourage you to schedule a comprehensive consultation with our eye doctor. We will evaluate your eyes thoroughly, discuss your vision goals, and help you understand all your options for achieving clearer sight. Our team is here to support you at every step, from your initial evaluation through your long-term follow-up care.