RGP Lenses for Keratoconus
Understanding Keratoconus and Vision Problems
Your cornea is the clear front surface of your eye that helps focus light. In keratoconus, the cornea loses its normal round dome shape and becomes thin and cone-shaped. This change usually happens slowly over many years, though it can progress faster in some people.
The irregular curvature creates distorted images on your retina. As the condition advances, the cornea may develop scarring or stretch marks that further reduce vision quality.
Blurred or distorted vision is often the first sign of keratoconus. You might notice that straight lines appear wavy or bent, especially when reading or looking at screens.
- Increased sensitivity to bright lights and glare
- Halos or streaks around lights at night
- Frequent changes in your eyeglass prescription
- Eye strain and headaches from trying to focus
- Double vision when looking with one eye
If your keratoconus is progressing, you may find that your glasses or contacts no longer work as well as they used to. Vision may become cloudier or more distorted even with corrective lenses.
Sudden changes in vision quality, increased blurriness, or new areas of cloudiness in your field of view should prompt a visit to our office. A sudden painful vision drop with marked light sensitivity, excessive tearing, or new corneal whitening or haze can signal acute hydrops, a complication that needs urgent same-day care. We can assess whether your condition is advancing and adjust your treatment plan accordingly.
Keratoconus typically starts during the teenage years or early twenties. Family history plays a significant role, so you are at higher risk if a close relative has the condition.
- People with chronic eye allergies who rub their eyes frequently
- Those with certain connective tissue disorders
- Individuals with Down syndrome
- Anyone with a history of vigorous eye rubbing
How RGP Lenses Help Keratoconus
RGP lenses improve vision but do not stop keratoconus progression. If your keratoconus is getting worse, corneal cross-linking is the main treatment to slow or halt further changes. Lenses and cross-linking often work together as part of a complete treatment plan.
Eyeglasses can only correct regular astigmatism, not the irregular distortions caused by a cone-shaped cornea. Soft contact lenses drape over your cornea and take on its irregular shape, so they cannot fully correct the vision problems.
As keratoconus advances, both glasses and soft lenses become less effective. Many patients reach a point where neither option provides acceptable clarity for daily activities.
RGP lenses are made from firm, oxygen-permeable materials that hold their shape on your eye. When you place an RGP lens on your cornea, tears fill the space between the irregular corneal surface and the smooth back surface of the lens.
This tear layer evens out the corneal irregularities, and the rigid front surface of the lens bends light in a uniform way. For many people with keratoconus, this approach provides much sharper, clearer vision than glasses or soft contacts, though results vary depending on disease severity and corneal scarring.
We typically suggest RGP lenses when your vision cannot be adequately corrected with glasses or soft contact lenses. This often happens in mild to moderate keratoconus.
- Your eyeglass prescription changes frequently but vision remains poor
- You experience significant distortion or multiple ghost images
- Soft contact lenses do not stay centered or provide clear vision
- You need better vision for work, school, or driving
Several specialized RGP designs are available for keratoconus. Standard RGP lenses work well for early-stage disease with mild cone formation. Modern keratoconus lens designs typically aim for apical clearance or minimal touch to reduce the risk of corneal scarring.
For more advanced cases, we may use specialized designs such as aspheric or multi-curve keratoconus lenses, larger intralimbal or corneal-scleral lenses, or piggyback systems where an RGP lens sits on top of a soft lens for added comfort. Our eye doctor will select the best option based on your corneal shape and needs.
Getting Fitted for RGP Lenses
Before fitting RGP lenses, we need detailed measurements of your corneal shape. We use corneal topography, a painless imaging technique that creates a color-coded map showing the curves and elevations of your cornea.
Additional tests may include measuring corneal thickness, evaluating the steepness of your cone, and checking your overall eye health. These measurements help us select the best lens design and starting parameters for your fit.
Your fitting appointment typically takes longer than a standard contact lens exam. We will try different trial lenses on your eyes to see how they fit and move with blinking.
- We assess how the lens centers over your cornea
- We check for proper movement and tear exchange
- We evaluate the alignment between the lens and your corneal surface
- We measure your vision with each trial lens
- We may use special dyes to see the contact pattern
Based on the trial lens results, we order custom lenses manufactured specifically for your eye shape. The prescription includes multiple parameters such as base curve, diameter, peripheral curves, and power.
Each eye usually requires different specifications because keratoconus rarely affects both eyes equally. We may need to make subtle adjustments to achieve the ideal balance of comfort, stability, and vision.
Once your custom lenses arrive, we will teach you how to insert, remove, and care for them. You will wear the lenses for a trial period, typically one to two weeks, to evaluate comfort and vision in real-world conditions.
We schedule follow-up visits to check the fit and make any needed modifications. Fine-tuning may involve ordering lenses with slightly different curves or edges to improve comfort and performance.
Adjusting to RGP Lenses
Most people feel aware of RGP lenses when they first start wearing them. You may feel a foreign body sensation, as if something is on your eye, especially when you blink.
Increased tearing and mild redness are also common initially. These sensations usually decrease as your eyes adapt, typically within two to four weeks of consistent wear.
We recommend starting with just a few hours of wear each day. Gradually increase your wearing time by one to two hours daily as comfort improves.
- Begin with two to four hours on the first day
- Add an hour or two each day as tolerated
- Aim for full-day wear within two to three weeks
- Remove lenses if discomfort becomes significant
Artificial tears approved for use with RGP lenses can help rinse away debris and refresh the tear layer under your lens. Using these drops several times a day often reduces awareness of the lens.
Blinking fully and regularly helps the lenses settle properly and promotes tear exchange. If your eyes feel dry, take breaks in a well-humidified environment and use preservative-free lubricating drops as needed.
Some discomfort is expected during the adjustment period, but sharp pain, intense burning, or sudden vision changes are not normal. These symptoms may indicate a poor fit, a damaged lens, or an eye injury.
Remove your lenses immediately if you experience severe pain or notice significant redness. Contact our office right away so we can examine your eyes and determine the cause.
Potential Complications and When to Seek Urgent Care
Like all contact lenses, RGP lenses carry some risk of complications. Being aware of these risks and following proper care routines can help keep your eyes safe.
- Corneal abrasion or staining from poor fit or overwear
- Infectious keratitis or corneal ulcer from contamination
- Giant papillary conjunctivitis from lens deposits or friction
- Worsening scarring from poorly fitting lenses
- Solution toxicity or allergic reactions
Remove your lenses immediately and contact our office or seek emergency care if you notice any of these warning signs.
- Eye pain that does not go away after removing your lenses
- Sudden vision loss or significant vision decrease
- Intense light sensitivity or eye discharge
- A white or cloudy spot on your cornea
- Severe redness or swelling
Daily Care and Long-Term Maintenance
Wash and dry your hands thoroughly before handling your lenses. Clean your RGP lenses every time you remove them. Place the lens in your palm, apply a few drops of RGP cleaning solution, and gently rub both sides with your fingertip for about 20 seconds.
Rinse thoroughly with sterile saline or the manufacturer-recommended rinse solution before storing in a clean case filled with fresh conditioning or disinfecting solution. Never use tap water, saliva, or expired solutions on your lenses or case. Do not shower or swim with lenses in, and do not rinse lenses or the case with tap water.
Always use fresh solution each time you store your lenses. Do not top off old solution, as this reduces disinfecting effectiveness and increases infection risk.
- Empty and rinse your lens case with solution daily
- Let the case air dry upside down after rinsing
- Replace your lens case every one to three months
- Discard solution bottles by the expiration date
RGP lenses are durable and typically last one to two years with proper care. However, they can develop scratches, deposits, or warping over time that affects vision and comfort.
We will examine your lenses at each visit for signs of wear. You may need earlier replacement if your lenses become damaged, develop stubborn deposits or coating issues, if your keratoconus progresses or you undergo cross-linking requiring new parameters, or if a lens is lost.
Regular follow-up appointments are essential to ensure your lenses continue to fit well and your eyes remain healthy. We typically schedule visits every three to six months for established RGP wearers. New fits and parameter changes usually require earlier follow-ups, often within days to weeks. More frequent visits may be needed if there is staining, scarring risk, dry eye, allergy, or progression.
During these visits, we check the condition of your lenses, evaluate how they fit your corneas, measure your vision, and examine your eye health. We also monitor your keratoconus to detect any progression that might require treatment adjustments.
Contact our office if your vision becomes blurry or fluctuates even with your lenses in place. This may mean your lenses have surface deposits, damage, or no longer match your corneal shape.
- Lenses feel increasingly uncomfortable after a period of good comfort
- Lenses do not center properly or fall out frequently
- You notice new scratches, chips, or cloudy areas on the lenses
- Your eyes appear red or irritated after wearing lenses
Other Treatment Options for Keratoconus
Corneal cross-linking is a procedure that strengthens the cornea by creating new bonds between collagen fibers. This treatment can slow or stop keratoconus from getting worse, especially in younger patients with progressive disease. Cross-linking is intended to stabilize the cornea; it may not restore vision by itself, and glasses or contacts are often still needed afterward.
The procedure involves applying riboflavin drops to your cornea and then exposing it to controlled ultraviolet light. We may recommend cross-linking if your keratoconus is worsening, even if you are successfully wearing RGP lenses.
Scleral lenses are larger rigid lenses that vault over the entire cornea and rest on the white part of your eye. They create a reservoir of fluid over the cornea, which can provide excellent comfort and vision for advanced keratoconus.
Many patients find scleral lenses more comfortable than traditional RGP lenses. We may suggest trying scleral lenses if you cannot tolerate standard RGP lenses or if your corneal shape is too irregular for smaller lenses to fit well.
Hybrid lenses feature a rigid center for clear vision surrounded by a soft outer skirt for comfort. This design can offer some of the visual benefits of RGP lenses with greater initial comfort.
However, hybrid lenses require careful fitting, more frequent replacement, and sometimes cost more than standard RGP lenses. We may consider them if you have not adapted well to traditional RGP lenses but need better vision than soft lenses can provide.
Most people with keratoconus manage well with RGP or scleral lenses. Surgery is typically reserved for advanced cases where contact lenses no longer provide adequate vision or comfort.
Corneal transplant surgery may be considered if your cornea has severe scarring or thinning. Newer procedures such as intracorneal ring segments can sometimes reshape the cornea and delay the need for transplant in select patients.
Frequently Asked Questions
Many people with advanced keratoconus can still wear RGP lenses successfully, though the fitting process may be more complex. If standard RGP lenses do not work well, we may try specialized designs or recommend scleral lenses instead.
Coverage varies widely by insurance plan. Some plans consider RGP lenses medically necessary for keratoconus and provide partial or full reimbursement, while others may not cover specialty contact lenses at all. Our staff can help you understand your specific benefits and submit claims on your behalf.
Do not sleep in RGP lenses unless your eye doctor has specifically prescribed an overnight-wear lens regimen for you; this is uncommon in keratoconus. Sleeping in lenses significantly increases your risk of serious eye infections and other complications. If you accidentally sleep in your lenses and wake with pain, redness, light sensitivity, or blurred vision, remove the lenses immediately and seek urgent evaluation.
Contact our office as soon as possible so we can order a replacement using your current lens specifications. If you have a backup pair, you can wear those while waiting for the replacement to arrive.
With proper care and handling, RGP lenses usually last one to two years. Your individual replacement schedule depends on how well you maintain the lenses, how your eyes respond, and whether your keratoconus changes over time.
Getting Help for RGP Lenses for Keratoconus
If you have keratoconus and are struggling with your vision, we can evaluate whether RGP lenses are right for you. Our eye doctor will perform a thorough examination, discuss all available treatment options, and create a personalized plan to help you see your best.