Contact Lenses for Keratoconus
Understanding Keratoconus and Contact Lens Challenges
Your cornea normally has a smooth, dome-shaped curve, but keratoconus causes it to bulge outward in a cone shape. Regular soft contact lenses are designed to rest on a round cornea, so they often shift position, do not center well, or come off easily when placed on an irregular surface. This unstable fit prevents the lens from staying centered over your pupil, which leads to blurry or distorted vision.
Standard contact lenses also cannot correct the irregular astigmatism that keratoconus creates. Irregular astigmatism means the uneven corneal shape bends light rays in unpredictable ways that simple lenses cannot fix. While glasses or regular contacts can correct normal astigmatism, the uneven surface of a keratoconic cornea scatters light in ways that require specialty lens designs to address. Specialty lenses create a new, smooth front surface that allows light to focus properly on your retina.
You may notice that your vision stays blurry or distorted even when you are wearing your contact lenses. This can happen if your keratoconus has progressed since your last fitting or if your lenses are not the right design for your corneal shape.
- Your lenses feel uncomfortable or cause pain after a short time
- You experience frequent redness or irritation on the surface of the eye near the colored part
- Your lenses move excessively when you blink or look around
- You see halos or starbursts around lights, especially at night
- One or both lenses pop out regularly during normal activities
Keratoconus often changes over time, especially in younger patients. As your cornea becomes steeper or more irregular, the lenses that once worked well may no longer provide clear vision or a comfortable fit. We monitor your corneal shape at each visit to determine whether your current lenses still match your eyes. It is important to understand that contact lenses improve your vision and comfort but do not stop keratoconus from progressing. If we detect that your keratoconus is getting worse, we may recommend corneal collagen cross-linking, a treatment designed to strengthen the cornea and halt further changes.
If your condition progresses, we may recommend a different lens design or material. For example, you might start with soft lenses in the early stages and later transition to rigid gas permeable or scleral lenses as your cornea changes. Regular follow-up appointments help us catch these changes early and adjust your treatment plan before your vision suffers. You can help protect your eyes by avoiding eye rubbing, which may speed up keratoconus progression and reduce lens tolerance. Managing allergies and dry eye is also important because these conditions can affect your ability to wear lenses comfortably and increase the risk of complications. Keep in mind that corneal scarring from advanced keratoconus may limit the best vision achievable even with specialty lenses.
Types of Contact Lenses for Keratoconus
If your keratoconus is mild, we may try specially designed soft lenses that are thicker in certain areas to better match your corneal curve. These lenses are more comfortable than rigid options and easier to adapt to for most patients. However, they work best only when the cornea has minimal irregularity.
Soft lenses for keratoconus typically need to be replaced more frequently than standard soft lenses. We will discuss the specific replacement schedule based on the brand and design we select for you. As your condition progresses, you may eventually need to switch to a more advanced lens type.
RGP lenses are made from firm, breathable plastic that holds its shape on your eye. When you blink, tears fill the space between the lens and your irregular cornea, creating a smooth optical surface. This design often provides sharper vision than soft lenses for moderate keratoconus.
- The lenses allow oxygen to reach your cornea, which keeps your eyes healthy
- They are custom-made to match the specific measurements of each eye
- Most patients need a few weeks to adjust to the firmer feel on the eye
- These lenses are durable and can last one to two years with proper care
Scleral lenses are larger than standard contact lenses and vault over your entire cornea to rest on the white part of your eye. These lenses are designed to create a space between the lens and your cornea that fills with preservative-free saline solution, which keeps your eye moist and creates a smooth optical surface. The fluid reservoir helps correct vision, though corneal scarring or advanced disease may still limit how clearly you can see. These lenses work well for advanced keratoconus or very sensitive eyes, although the fit must be monitored over time because the lens can settle and may contact the cornea if not properly optimized.
Because scleral lenses vault the cornea rather than resting directly on it, they are often more comfortable than smaller rigid lenses. They also stay centered better during physical activity and are less likely to dislodge than smaller corneal gas permeable lenses. We will teach you how to fill the lens with saline and insert it using a special technique.
Hybrid lenses combine a rigid center with a soft outer skirt. The rigid center provides clear vision by creating a smooth surface over your irregular cornea, while the soft edge offers more comfort and stability than a fully rigid lens. This design can be a good middle ground if you cannot tolerate RGP lenses but need better vision than soft lenses provide.
These lenses require careful handling because the junction between the rigid and soft portions can tear if you are not gentle during insertion and removal. We will show you the proper technique and provide practice time in our office. Some patients find hybrids easier to adapt to than fully rigid options.
A piggyback system uses two lenses on the same eye. You first insert a soft contact lens, then place a rigid lens on top of it. The soft lens acts as a cushion between your cornea and the rigid lens, which can make wearing RGP lenses more comfortable if your eyes are very sensitive.
- This approach adds extra steps to your daily routine for insertion and removal
- You need to care for two different types of lenses with separate solutions
- The overall oxygen delivery depends on the materials and thickness of both lenses
- We may consider this option if other designs have not worked for you
For very advanced or unusual keratoconus patterns, we can order lenses that are custom-designed based on a detailed map of your cornea. These lenses are made specifically for your eyes using computer modeling to predict how the lens will fit and perform. The design process takes into account the unique features of your corneal shape.
Custom lenses may take several weeks to manufacture after we send your measurements to the laboratory. We often order these when standard specialty lens designs do not provide adequate vision or comfort. Although they cost more than off-the-shelf options, they may offer better outcomes for challenging cases.
The Fitting Process for Keratoconus Contact Lenses
Your first fitting appointment usually lasts longer than a routine eye exam because we need to gather detailed information about your eyes. We will ask about your vision goals, daily activities, and any previous contact lens experience. This conversation helps us choose the best lens type to try first.
We will also examine your eyes carefully to check for any signs of corneal scarring, allergies, or dry eye that might affect lens wear. Understanding your overall eye health allows us to create a fitting plan that keeps your eyes safe while improving your vision. Some patients need to address other eye conditions before we can fit contact lenses successfully.
We use a device called a corneal topographer to create a detailed color map of your corneal shape. A topographer measures the curve of your cornea at many points to show us exactly where it is steepest, flattest, or most irregular. This painless test takes only a few seconds, and the map guides our lens selection and helps us monitor changes over time.
- The measurements help us choose the right lens diameter and base curve
- We may also measure your eye's wavefront, which describes how light distorts as it passes through your eye
- Imaging can reveal subtle changes that affect lens fit
- We will repeat these measurements at follow-up visits to track progression
Once we select a lens design, you will try on diagnostic lenses in our office so we can evaluate the fit. We look at how the lens centers on your eye, how it moves when you blink, and whether it provides clear, stable vision. You will sit in the exam chair while we use special instruments to examine the lens on your eye.
We may try several different lenses during this appointment to find the best match. Each lens sits on your eye for a few minutes while we assess comfort and vision quality. Based on what we observe, we will either order your final lenses or schedule another fitting session with different trial lenses.
Standard specialty lenses typically arrive within one to two weeks after we place the order. Custom-designed lenses made specifically for your corneal shape may take three to six weeks because they require individual manufacturing. We will give you an estimated delivery date when we submit your order.
Once your lenses arrive, we will contact you to schedule a pickup and evaluation appointment. During that visit, we will watch you insert and remove the lenses, check the fit one more time, and answer any questions you have. Some adjustments may be needed after you wear the lenses in your daily life for a few days.
Wearing and Adjusting to Your Keratoconus Contact Lenses
Your eyes need time to adapt to specialty contact lenses, especially if they are rigid or scleral designs. You may feel lens awareness or mild discomfort for the first few days, but this usually improves as your eyelids get used to the lenses. We often recommend starting with just a few hours of wear per day and gradually increasing the time.
- Some lens awareness is normal, but sharp pain is not
- Your vision may fluctuate slightly as your tear film settles around the lenses
- Increased tearing and light sensitivity can occur initially but should decrease
- Most patients adapt fully within two to four weeks of consistent wear
Small rigid lenses are placed directly on your eye using your fingertip, similar to soft lenses but with more precision. We will teach you to position the lens on your index finger, pull your eyelids apart with your other hand, and place the lens gently on your cornea. For removal, some patients use a technique that involves pulling the eyelid to blink the lens out, but this should be taught and supervised carefully to avoid losing or damaging the lens. Many clinics recommend using a small suction holder for removal, which provides more control. If you experience pain during insertion or removal, stop and contact our office.
Scleral lenses require a different technique because of their larger size. You will fill the bowl of the lens with preservative-free saline, lean over a mirror, and use both hands to guide the lens onto your eye while looking down. We provide special plungers that can help with insertion and removal until you master the technique. Practice in our office will build your confidence before you try at home.
We will create a wear schedule based on your lens type and how your eyes respond. Rigid and hybrid lenses often require a gradual build-up period, starting with four hours on the first day and adding an hour or two each day. Scleral lenses may be worn longer from the start because they are often more comfortable.
Most patients eventually wear their lenses for eight to twelve hours per day. Wearing lenses longer than recommended can reduce oxygen flow to your cornea and increase the risk of complications. Always remove your lenses before sleeping unless we have specifically prescribed extended wear lenses and discussed the additional risks with you.
Even well-fitted lenses may eventually need updating as your cornea changes or the lenses age. If your vision becomes blurry or unstable despite clean lenses, the fit may no longer be optimal. Persistent redness in a specific area of your eye can indicate that the lens is rubbing or pressing too hard.
- You notice new discomfort that does not go away after removing the lens
- Your lenses start falling out more frequently than before
- You see new or worsening glare and halos around lights
- Your wearing time decreases because the lenses bother you sooner
- You develop recurrent eye infections or inflammation
Caring for Your Keratoconus Contact Lenses
After removing your lenses each day, place each lens in the palm of your hand and apply a few drops of the cleaning solution we recommend. Gently rub the lens with your finger for about twenty seconds on each side to remove protein deposits and debris. This mechanical cleaning is important even if your solution claims to be a no-rub formula. Different lens types require different care systems, such as multipurpose solutions for some lenses or hydrogen peroxide systems for others, and gas permeable lenses often need specific cleaners. Always use the solution recommended for your specific lens type and do not mix systems.
Rinse the lens thoroughly with fresh solution and place it in a clean case filled with new disinfecting solution. Never reuse old solution or top off your case with fresh solution, as this can allow harmful microorganisms to grow. The lenses should soak for at least the minimum time listed on your solution bottle, usually four to six hours. If you wear scleral lenses, remember that the sterile saline you use to fill the lens before insertion is separate from the disinfecting solution you use for overnight storage. Never use saliva, tap water, or homemade saline on your lenses, and do not reuse saline from one wear to the next.
Protecting your lenses and eyes from water exposure is one of the most important steps you can take to prevent serious eye infections. Microorganisms in water can attach to your lenses and cause vision-threatening infections such as microbial keratitis.
- Never rinse your lenses or lens case with tap water, bottled water, or any non-sterile water
- Remove your lenses before swimming, using hot tubs, or showering
- Always wash your hands thoroughly with soap and dry them completely before handling your lenses
- Use only the contact lens solutions recommended by our office for your specific lens type
- Replace your lens case every one to three months and rinse it with fresh solution each morning, then let it air dry completely
Rigid gas permeable lenses and hybrid lenses are stored in small lens cases with separate wells for each eye. Always mark your case to avoid mixing up your right and left lenses, as they may have different parameters. Replace your lens case every one to three months to prevent contamination.
- Scleral lenses require larger cases designed for their size
- Store all lenses in the specific solution recommended for that lens type
- Keep your lens case in a clean, dry area away from the bathroom sink and water sources
- Rinse your case with fresh solution and let it air dry each morning
Rigid gas permeable lenses typically last one to two years if you care for them properly. We will check your lenses at each follow-up visit for scratches, deposits, or warping that might require earlier replacement. Over time, surface deposits, scratches, and lens changes can reduce comfort and affect how well oxygen reaches your cornea.
Scleral and hybrid lenses often need replacement every twelve to twenty-four months, though this varies depending on how quickly deposits build up, whether scratches develop, and whether the lens warps or the surface coating degrades. We will tell you the expected lifespan of your specific lenses when you receive them. Always bring your lenses to your appointments so we can evaluate their condition and determine if replacement is needed.
Remove your contact lenses immediately if you experience sudden vision loss, severe pain, or intense light sensitivity. These symptoms may indicate a serious problem such as a corneal abrasion, infection, or other urgent condition. Contact our office right away or seek emergency eye care if we are not available.
- Your eye becomes very red and the redness is worsening or persistent after lens removal
- You notice discharge or crusting on your eyelids or lashes
- You develop increasing pain, worsening redness, light sensitivity, or decreased vision along with a white or cloudy spot on your cornea, which may signal microbial keratitis
- You experience a sudden painful drop in vision with new corneal cloudiness or whitening, which may indicate acute corneal hydrops, a keratoconus-specific urgent event
- A foreign object becomes stuck under your lens and you cannot flush it out
- Your eye feels painful even after you have removed the lens
Retinal symptoms such as flashes of light or new floaters in your vision are also urgent and require immediate evaluation, though these are not typically related to contact lens wear. If you experience any of these symptoms, contact an eye care provider promptly.
Frequently Asked Questions
Specialty lenses for keratoconus typically cost more than regular contact lenses because they require custom fitting and advanced designs. The total cost includes the fitting appointment, corneal mapping, trial lenses, and the final lenses themselves. Prices vary based on lens type and complexity, but many patients find the investment worthwhile for the significant improvement in vision and quality of life.
Some medical insurance plans cover medically necessary contact lenses when you have keratoconus, especially if glasses cannot provide adequate vision correction. We will provide documentation of your diagnosis and the medical need for specialty lenses to help you submit a claim. Coverage varies widely between plans, so we recommend contacting your insurance company before your fitting to understand your benefits and any out-of-pocket costs.
Most specialty contact lenses stay secure during exercise, sports, and other physical activities. Scleral lenses are particularly stable because they vault over the entire cornea and are less likely to dislodge than smaller lenses. If you play contact sports, we recommend wearing protective eyewear over your lenses to prevent injuries, and you should carry a backup pair of lenses or glasses in case a lens falls out or becomes damaged.
If we detect that your keratoconus is progressing, we often recommend corneal collagen cross-linking, a treatment that strengthens the cornea and is designed to slow or stop further changes. Cross-linking can be performed alongside contact lens wear and is commonly considered when progression is documented, helping preserve your vision and potentially improving lens tolerance. If multiple lens types have failed to provide comfort or adequate vision, we can discuss other options. For advanced cases, surgical treatments such as corneal ring implants or corneal transplant may be considered, though we typically work to optimize contact lens options first.
We typically schedule follow-up visits one week after you receive your new lenses, then one month later, and then every three to six months once your fit is stable. If your keratoconus is still progressing, we may see you more frequently to monitor changes and update your lenses as needed. Annual comprehensive eye exams are important even when your lens fit is stable, as they allow us to check your overall eye health and watch for other conditions that can develop.
Getting Started with Contact Lenses for Keratoconus
Our eye doctor has specialized training in fitting contact lenses for keratoconus and other corneal irregularities. We will work closely with you to find the lens option that offers the clearest vision and best comfort for your daily life. If you are experiencing vision problems from keratoconus or struggling with your current lenses, we encourage you to schedule a consultation so we can evaluate your eyes and discuss your options.