RGP Lenses for Keratoconus
RGP Lenses for Keratoconus: An Overview and Modern Alternatives
Understanding RGP Lenses for Keratoconus Rigid Gas Permeable (RGP) lenses have long been a cornerstone in the management of keratoconus. For many years, these lenses were the primary option for patients seeking to correct the vision distortions caused by this corneal condition. RGP lenses work by creating a smooth refractive surface over the irregularly shaped cornea, thus providing clearer vision.
Benefits of RGP Lenses Rigid Gas Permeable (RGP) lenses offer several advantages for keratoconus patients. Primarily, their rigid nature allows them to maintain their shape on the eye, unlike soft lenses which might conform to the irregular cornea. This characteristic enables RGP lenses to create a smooth, uniform refractive surface over the cornea, effectively compensating for the cone-like shape typical of keratoconus, and thereby significantly improving visual clarity.
How RGP Lenses Work RGP lenses function by sitting over the corneal irregularity, rather than molding to it. The space between the back of the contact lens and the front of the cornea forms a tear-filled ‘vault’ that neutralizes the irregularities of the corneal surface, resulting in clearer, more focused vision. This tear layer also plays a crucial role in providing comfort, as it cushions the lens against the sensitive corneal tissue.
Customization and Fitting Fitting RGP lenses requires precise customization and expert adjustment. Due to the protrusion and thinning of the cornea in keratoconus patients, each RGP lens must be specifically designed to fit the individual’s unique corneal topography. This process involves detailed mapping of the cornea using instruments like corneal topographers and may require several fitting sessions to ensure optimal comfort and vision correction.
Long-term Use and Care With proper care, RGP lenses can be very durable, often lasting one to three years before needing replacement. They require regular cleaning and disinfection to prevent protein deposits and potential eye infections. Patients are advised to follow a strict lens care routine and schedule regular follow-up appointments to monitor eye health and lens condition.
Considerations and Adjustments While RGP lenses offer excellent vision correction, the adaptation period can be challenging for some patients, especially those new to contact lenses. Initial discomfort is common as the eye adjusts to the presence of the lens. However, most users find that comfort improves significantly within a few weeks as their eyes adapt.
By choosing RGP lenses, keratoconus patients can benefit from sharp, stable vision and a relatively non-invasive approach to managing their condition. These lenses remain a valuable solution, particularly for those whose corneal structure allows for safe and effective lens placement.
The Evolution of Contact Lens Technology
While RGP lenses are still a viable option for many, advancements in contact lens technology have introduced a variety of alternatives that cater to different needs and preferences. Today, keratoconus patients can choose from several innovative types of lenses, including:
- SynergEyes Hybrid Lenses: These combine a rigid center with a soft lens perimeter, offering the clarity of RGPs with the comfort of soft lenses.
- Scleral Lenses: Larger in diameter than traditional contact lenses, scleral lenses vault over the cornea and rest on the sclera, providing excellent comfort and stable vision.
- PROSE Lenses: Customized prosthetic devices that help maintain a healthy ocular surface and improve vision.
- EyePrint PRO Lenses: Tailored specifically to the unique contours of the patient’s eye, offering a precise fit for those with highly irregular corneas.
Our Approach to Keratoconus Contact Lenses
At our practice, we focus on designing and prescribing highly customized contact lenses made specifically for keratoconus. Using these advanced lens options, the majority of our patients achieve corrected vision without the need for surgical procedures, such as corneal transplants or corneal implants (Intacs). We are also skilled in managing post-surgical vision challenges, helping those who have undergone such procedures but still face vision issues.
Keratoconus contact lenses aim to improve visual acuity (e.g., achieving 20/20 vision) and correct Higher Order Aberrations (HOAs). By addressing these complex visual defects, the lenses effectively reduce symptoms like glare, halos, ghosting, starbursts, and double vision, enhancing overall visual quality and precision
Choosing the Right Lens for You
Each type of lens offers unique benefits, and the best choice depends on individual factors like the severity of keratoconus, the shape of the cornea, and personal comfort preferences. During your consultation, we will conduct a comprehensive evaluation to determine the most effective lens type for your specific condition.
Our commitment is to empower you with clear, consistent vision and long-term eye health, enabling you to lead a normal, productive life. Schedule your appointment today to explore the best lens options for your keratoconus treatment.
Dr. Irwin Azman, and Dr. Benjamin Azman, Keratoconus Specialists, prescribe RGP contact lenses for a variety of hard-to-fit eyes, including patients with Stevens-Johnson Syndrome, Radial Keratotomy / Lasik Complications and Lasik failures, Keratoconus, Corneal Ectasia, Post-Surgical Vision Loss, Pellucid Marginal Degeneration, and other irregular corneas.
Dr. Azman, one of the country’s top Keratoconus Specialists neither avoids nor declines the challenge of prescribing the most difficult cases.
