Artificial Corneas and Myopia Treatments
Understanding When Artificial Corneas May Be Needed
An artificial cornea, also called a keratoprosthesis, is a special medical device that replaces your natural cornea when it cannot be repaired or when traditional corneal transplants have failed. Unlike a donor cornea from another person, this device uses biocompatible materials designed to let light enter your eye clearly.
A keratoprosthesis is different from a standard corneal transplant, which uses donated human corneal tissue to replace damaged layers. The most common artificial cornea device is assembled using a donor corneal carrier that holds the prosthesis in place, with a clear central optical part that lets light pass through to your retina.
We may consider this option when other treatments have not worked or when transplants are unlikely to succeed. The procedure is complex and requires lifelong care and monitoring.
Several serious eye conditions can damage your cornea so severely that an artificial replacement becomes necessary. These conditions often involve scarring, clouding, or structural breakdown of the cornea that prevents traditional healing.
- Multiple failed corneal transplants that did not restore vision
- Severe chemical or thermal burns to the eye surface
- Stevens-Johnson syndrome, ocular cicatricial pemphigoid, or other severe autoimmune and cicatrizing surface diseases
- Limbal stem cell deficiency preventing corneal healing
- Severe neurotrophic keratopathy with persistent corneal breakdown
- Severe herpetic corneal disease with repeated graft failure
- Severe corneal scarring from infections or injuries
- Aniridia (absence of the iris) with corneal problems
Patients with severe autoimmune surface disease may face higher complication risks and may require specialized device selection and close co-management with other specialists.
Recognizing when your corneal condition is getting worse helps us intervene before you lose more vision. You should contact our office if you notice any changes in how your eyes look or feel.
Warning signs include increasing blurriness that glasses cannot fix, new pain or sensitivity to light, redness that does not go away, cloudy or white areas spreading across your cornea, or sudden vision loss. We need to examine you promptly if any of these symptoms appear.
Not everyone with corneal disease needs an artificial cornea. We carefully evaluate each patient to determine if this advanced procedure is the right choice based on your specific eye health and medical history.
Good candidates typically have severe corneal disease that has not responded to other treatments, enough healthy eye tissue to support the device, and realistic expectations about visual outcomes. Your eyes must also have adequate retinal and optic nerve function to benefit from improved corneal clarity. You need to be able to tolerate and maintain a bandage contact lens continuously, and any glaucoma must be controlled or manageable with treatment and monitoring.
You must also be able to follow strict aftercare instructions and attend regular follow-up appointments for the rest of your life. Patients with end-stage glaucoma or optic nerve damage, uncontrolled retinal disease, or inability to adhere to intensive follow-up and medication schedules may not be suitable candidates for this procedure.
Understanding Myopia: Nearsightedness Explained
Myopia occurs when your eyeball grows too long from front to back, or when your cornea curves too steeply. This causes light entering your eye to focus in front of your retina instead of directly on it, making distant objects appear blurry while close objects remain clear.
The condition can be mild, moderate, or severe depending on how much your eye's shape differs from normal. High myopia means you need strong correction and may face greater risks for other eye problems later in life.
The hallmark symptom of myopia is difficulty seeing things far away. Children may not realize they have a problem because they have never known clear distance vision.
- Squinting to see distant signs, chalkboards, or television screens
- Headaches from eye strain, especially after driving or watching movies
- Sitting unusually close to screens or holding books very near your face
- Difficulty seeing clearly while playing sports or during outdoor activities
Children's eyes grow rapidly, and this growth can cause myopia to progress year after year. The younger a child is when myopia starts, the more time their eyes have to keep growing longer, which typically means stronger nearsightedness by adulthood.
Growth usually slows down in the late teenage years, so myopia progression often stabilizes after age eighteen or twenty. However, some people continue to experience changes into their twenties.
Both genetics and environment play important roles in whether you develop myopia. Understanding these risk factors helps us identify children who may benefit from early intervention.
- Having one or both parents with nearsightedness increases your risk significantly
- Spending large amounts of time on close-up work like reading or screen use
- Limited time spent outdoors in natural daylight during childhood
- Certain ethnicities have higher rates, particularly East Asian populations
Diagnostic Testing for Corneal Problems and Myopia
Every evaluation starts with a thorough examination of your overall eye health. We check your vision at different distances, measure how well your eyes work together, and examine all the structures inside and outside your eyes.
Our eye doctor will ask about your symptoms, medical history, and family history of eye disease. We also test your current prescription if you wear glasses or contacts to see if your vision has changed since your last visit.
When we suspect corneal problems, we use specialized equipment to examine the layers and health of your cornea in detail. These tests are painless and help us determine the extent of damage or disease.
- Slit lamp examination with high magnification to inspect all corneal layers
- Corneal pachymetry to measure the thickness of your cornea
- Corneal staining with fluorescein or other vital dyes to assess epithelial damage and tear film health
- Corneal sensation testing using a gentle cotton wisp or specialized instruments
- Evaluation of your ocular surface health and function
We measure myopia in units called diopters, which indicate how much corrective power you need. Myopia is expressed as a negative number. Mild myopia ranges from negative 0.25 to negative 3.00 diopters, moderate extends from negative 3.25 to negative 6.00 diopters, and high myopia means negative 6.25 diopters or more.
We also measure your eye's length using special ultrasound or optical devices. This axial length measurement helps us track progression over time, predict future changes, and guide decisions about myopia control treatments, especially in children.
Advanced imaging gives us a detailed map of your cornea's shape, thickness, and irregularities. This information is essential for planning treatments like laser surgery or fitting specialty contact lenses.
Corneal topography creates a color-coded map showing the curvature of your corneal surface. Tomography goes deeper, measuring the front and back surfaces and internal structure. These scans take only seconds and require no contact with your eye.
Myopia Control for Children and Teens
Specialized eyeglasses and soft contact lenses designed to slow myopia progression are now widely available and supported by clinical research. These optical devices use dual-focus or multifocal designs that provide clear central vision while creating specific peripheral focus signals that may slow excessive eye growth.
Myopia control spectacle lenses look similar to regular glasses but have special optical zones built into the lens design. Myopia control soft contact lenses include daily disposable and monthly options with concentric rings or other patterns that reduce progression in many children and teens.
- Ideal for children and adolescents with progressive myopia who need vision correction
- Requires fitting and baseline measurements by our eye doctor
- Follow-up visits every three to six months to monitor eye growth and adjust treatment
- Can be combined with other approaches like atropine drops for greater effect
- Contact lens options require maturity and good hygiene habits
Orthokeratology, or ortho-k, uses specially designed rigid contact lenses that you wear only while sleeping. These lenses reshape the front surface of your cornea overnight, providing clear vision throughout the next day without glasses or daytime contacts.
This treatment is reversible and works well for mild to moderate myopia. Clinical studies show that ortho-k may also slow myopia progression in children, making it both a corrective and preventive option for young patients. However, proper use and hygiene are critical for safety.
- Risk of microbial keratitis, a serious eye infection, especially with overnight wear
- Requires strict hygiene practices and careful lens cleaning and storage
- Avoid all water exposure with lenses, including swimming, hot tubs, and showers
- Do not wear lenses if you are ill or have any eye irritation
- Contact us immediately if you experience eye pain, redness, discharge, light sensitivity, or decreased vision
Low-dose atropine eye drops, used once daily at bedtime, have become a commonly used approach for slowing down myopia progression in children. The drops work through mechanisms that are not completely understood but appear to reduce the signals that cause the eyeball to grow longer.
We typically prescribe concentrations between 0.01 and 0.05 percent. Side effects can include light sensitivity, near vision blur, eye irritation or allergy, and occasional headaches. These effects are generally dose-dependent, with higher concentrations more likely to cause symptoms. Some children may experience rebound progression if the drops are stopped abruptly, so we plan a gradual taper when appropriate.
Treatment protocols vary in dose selection and duration based on each child's response. This treatment does not eliminate myopia but can significantly reduce how much worse it gets during the critical growth years. We monitor your child regularly to assess effectiveness and adjust the approach as needed.
Myopia Correction Options
Traditional eyeglasses remain the safest and simplest way to correct nearsighted vision. Your lenses bend light so it focuses properly on your retina, giving you clear distance vision whenever you wear them.
Contact lenses offer the same correction with a wider field of view and no frames blocking your peripheral vision. We can fit you with daily disposable, monthly, or specialty lenses depending on your eye health and lifestyle preferences.
Laser vision correction reshapes your cornea permanently to correct your refractive error. We offer several approaches based on your corneal thickness, myopia level, and lifestyle needs. These procedures are designed for adults whose vision has stabilized and who meet specific eye health criteria.
- LASIK creates a thin flap in the cornea, reshapes the tissue beneath, then replaces the flap for quick healing
- PRK removes the outer corneal layer and reshapes the surface, ideal for thinner corneas or certain occupations
- SMILE uses a single laser to create and remove a small disc of tissue through a tiny incision, preserving more corneal structure
You must have a stable prescription, adequate corneal thickness, and no signs of corneal ectatic diseases like keratoconus to be a candidate. As with any surgery, laser vision correction carries risks and limitations that we discuss thoroughly during your consultation.
- Dry eye symptoms that can be temporary or longer-lasting
- Glare, halos, or difficulty with night vision, especially in low light
- Under-correction, over-correction, or regression requiring enhancement procedures
- Rare but serious risks including infection, inflammation, or corneal ectasia
- Presbyopia will still develop with age, and reading glasses may be needed later
When your myopia is too severe for laser surgery to safely correct, we may recommend an implantable collamer lens or phakic intraocular lens. Our surgeon places this lens inside your eye, in front of your natural lens, through a small incision.
These lenses provide excellent vision quality and can correct very high levels of nearsightedness that lasers cannot address. The lenses are removable or exchangeable in many cases, and your natural lens remains in place. Your ability to focus at different distances is generally preserved, though natural accommodation declines with age.
- Risk of cataract development, which may require future cataract surgery
- Possible elevated eye pressure or pupillary block depending on lens type and placement
- Regular monitoring of corneal endothelial cell counts to ensure eye health
- Requires adequate anterior chamber depth for safe lens placement
- May need lens exchange or removal in the future if prescription changes or complications arise
Selecting the best treatment depends on many factors beyond just your prescription. We consider your age, whether your vision is still changing, your daily activities, your career, and your personal preferences.
Young children typically benefit most from myopia control strategies like specialized lenses or atropine. Active teens and adults who want freedom from glasses may prefer laser surgery if their eyes are stable and healthy. We guide you through the pros and cons of each option to find your best fit.
Artificial Cornea Surgery: Procedure and Risks
Our eye doctors consider keratoprosthesis only after exhausting other options. If you have had multiple failed transplants, severe surface disease that prevents graft survival, or bilateral corneal blindness with no other solutions, we may discuss this advanced procedure with you.
The decision requires careful discussion about your overall health, your ability to use eye drops multiple times daily for life, and the realistic visual outcomes you can expect. We want you to understand both the potential benefits and the ongoing commitment required.
The most commonly used device currently is the Boston Keratoprosthesis, which comes in different types for different clinical situations. Type I is used when you have some healthy surrounding tissue, while Type II is reserved for the most severe cases involving severe cicatrizing ocular surface disease with keratinization and eyelid abnormalities.
Other keratoprosthesis devices exist and continue to be developed, but the Boston device remains the most widely used. We stay current with the latest approved options and choose the device most appropriate for your specific eye condition and anatomy.
Before surgery, we perform extensive testing of your eye and review your medical history. You will need to stop certain medications and arrange for someone to drive you home after the procedure.
- The surgery takes place in an operating room under local or general anesthesia
- Our surgeon removes damaged corneal tissue and secures the artificial device in place
- The procedure typically lasts one to two hours depending on complexity
- You go home the same day with protective eye coverage and multiple prescription eye drops
Like all major eye surgeries, keratoprosthesis carries risks that we discuss thoroughly before you decide to proceed. Complications can occur and may require additional procedures or intensive treatment.
- Endophthalmitis or infectious keratitis, serious infections that can threaten vision
- Sterile keratolysis or corneal melt around the device
- Retroprosthetic membrane formation behind the device
- Glaucoma progression and difficulty measuring eye pressure accurately
- Retinal detachment or other retinal complications
- Device leak, extrusion, or mechanical failure requiring revision
Success rates for maintaining the device and improving vision have improved significantly with modern techniques and close follow-up care. Visual outcomes depend heavily on your underlying diagnosis, the health of your retina and optic nerve, and whether you have glaucoma or other comorbid eye disease. Some patients achieve functional vision that allows them to navigate independently and perform daily tasks, though perfect vision is rarely the outcome. We monitor you closely to catch and treat problems early.
Aftercare, Long-Term Management, and Warning Signs
Recovery requires strict adherence to your eye drop schedule and activity restrictions. You will use antibiotic, anti-inflammatory, and lubricating drops several times each day. Lifelong topical antibiotic prophylaxis is typically required, and long-term steroid drops with gradual tapering and monitoring are often needed to prevent inflammation and rejection.
You will need to wear a bandage contact lens continuously to protect the device and ocular surface. This lens requires regular scheduled replacement, even if it feels comfortable. Frequent monitoring for glaucoma is essential, as eye pressure can be difficult to measure accurately after keratoprosthesis, and you may need glaucoma medications or procedures.
You must never rub your eye and must avoid all water exposure to the eye, including swimming pools, hot tubs, and direct shower spray. Wear protective eyewear during sleep and any risky activities. We see you frequently in the weeks after surgery, then gradually space out appointments if your eye remains stable.
Missing doses of your prescribed eye drops or skipping follow-up appointments can lead to serious complications that threaten both the device and your vision. Contact us immediately if you have any concerns or difficulty maintaining your treatment schedule.
After laser surgery or lens implantation, your eyes need time to heal and adjust. We provide detailed instructions about using prescribed drops, avoiding eye makeup temporarily, and limiting strenuous activities for a few weeks.
Long-term protection includes wearing sunglasses outdoors to shield your eyes from harmful ultraviolet light, attending regular eye exams to monitor for rare complications, and reporting any vision changes promptly. Even with permanent correction, your eyes can develop other conditions as you age.
Follow-up schedules vary based on which treatment you receive. After artificial cornea surgery, you may visit us every few days initially, then monthly, and eventually every few months for life.
For myopia treatments, children using atropine or ortho-k need exams every three to six months to monitor progression and adjust treatment. Adults after laser surgery typically visit at one day, one week, one month, three months, and then annually if everything heals normally.
Some symptoms signal serious problems that need immediate same-day evaluation or emergency care. Contact our office or seek emergency treatment right away if you experience any concerning changes.
- Sudden vision loss or a curtain or shadow blocking part of your visual field
- Severe eye pain that does not improve with prescribed medications
- Increasing redness, discharge, or swelling, or new white spot near the device
- Bandage contact lens falling out, feeling displaced, or sudden fluid leak
- New severe light sensitivity beyond your usual baseline after device surgery
- Concern that the device may be loosening, shifting, or extruding
- Flashes of light, new floaters, or distorted vision appearing suddenly
- Any trauma or injury to your eye after corneal surgery
Frequently Asked Questions
Myopia results from the physical shape of your eyeball, so once your eye grows too long, it cannot shrink back. Laser surgery reshapes your cornea to compensate for this elongation, effectively eliminating your need for glasses, but the underlying elongation remains. If you develop age-related vision changes later, you may need reading glasses even after successful distance correction.
No, these are different procedures for different situations. A corneal transplant replaces your damaged cornea with healthy donor tissue from another human. An artificial cornea uses a manufactured device and is reserved for cases where transplants have failed or are not possible due to severe surface disease or immune rejection risk.
Many children do experience progressive myopia as they grow, especially if it starts before age ten. However, myopia control treatments now available, including low-dose atropine drops, orthokeratology, and specialized myopia control glasses or soft contact lenses, can slow this progression significantly. Encouraging outdoor time and managing close-up work also help, though genetics play a major role we cannot change.
It depends on how severe your myopia is and how thick your corneas are. Very high myopia may require removing too much corneal tissue for safety. In these cases, we may recommend implantable lenses instead, which can correct extreme nearsightedness without removing any corneal tissue. We perform detailed measurements during your consultation to determine your best surgical option.
Modern keratoprosthesis devices can last many years when properly maintained and monitored. Some patients keep their devices for a decade or longer, while others may need revision surgery sooner due to complications. The device itself is durable, but surrounding tissue health and careful infection prevention determine long-term success. Lifelong follow-up care is essential for maintaining both the device and your vision.
Getting Help for Artificial Corneas and Myopia Treatments
Whether you are struggling with progressive myopia or facing severe corneal disease, our eye doctors are here to provide expert evaluation and the full range of modern treatment options. We take time to understand your vision goals and create a personalized care plan that fits your needs. Schedule a comprehensive eye exam with us to discuss which treatments are right for you.