Keratoconus: Clearer Vision with RGP and Scleral Contact Lenses
Medically Reviewed by Dr. Samantha Rao, OD, FAAO, FSLS on February 6, 2025
Keratoconus is a progressive eye condition that causes the cornea, the clear front surface of the eye, to gradually thin and bulge outward into a cone-like shape. This irregular curvature can significantly distort vision. While there’s no cure for keratoconus, there are effective management options available, including specialized contact lenses.
Understanding Keratoconus
Keratoconus typically begins in adolescence and progresses slowly over several years. Symptoms may include blurred vision, nearsightedness, astigmatism, light sensitivity, and frequent changes in prescription. Keratoconus is more common in patients with significant environmental allergies who rub their eyes often. It is important for keratoconus patients to avoid rubbing their eyes, as this can further weaken the cornea and worsen vision.
The Role of Contact Lenses in Keratoconus Management
Traditional soft contact lenses often fail to correct the irregular vision caused by keratoconus. However, rigid gas permeable (RGP) and scleral lenses offer superior results.
- Rigid Gas Permeable (RGP) Lenses: These lenses are made of a hard, gas-permeable material that rests directly on the cornea. They offer a smooth, artificial surface over the irregular cornea, improving vision clarity. RGP lenses are durable and provide excellent visual acuity.
- Scleral Lenses: Larger than RGP lenses, scleral lenses rest on the white part of the eye, creating a vault over the cornea. This design helps to correct vision while providing added comfort, especially for patients with dry eye or corneal sensitivity. Scleral lenses hold a reservoir of fluid, which can help to lubricate the eye and alleviate dryness.
Choosing the Right Lens
The best type of contact lens for keratoconus depends on the severity of the condition and individual eye characteristics. Your optometrist will carefully evaluate your eyes to determine the most suitable option. Factors such as comfort, vision quality, and lifestyle will also be considered.
Regular Eye Examinations
Regular eye exams are crucial for managing keratoconus. Your optometrist will monitor the progression of the condition and adjust your contact lens prescription as needed. Early detection and treatment can help slow the progression of keratoconus and preserve vision.
If you suspect you may have keratoconus or are experiencing vision changes, schedule a comprehensive eye exam with an optometrist. With proper care and the right contact lenses, individuals with keratoconus can enjoy significantly improved vision and quality of life.
Disclaimer: This article is intended for informational purposes only and does not constitute medical advice. Please consult with an optometrist for diagnosis and treatment of any eye condition.
