Breakthrough in Overnight Vision Correction: New lens Shows Rapid Stabilization
Table of Contents
- 1. Breakthrough in Overnight Vision Correction: New lens Shows Rapid Stabilization
- 2. Enhanced Lens design for Improved Fit and Comfort
- 3. Impressive results After Initial Wear
- 4. The Growing Field of Myopia Management
- 5. Frequently Asked Questions about Orthokeratology
- 6. How does ignoring the difference between central and peripheral astigmatism in toric patients affect Ortho-K treatment success?
- 7. Toric Peripheral Curves in Ortho-K Lenses: Ensuring Stability and Comfort for Toric Patients
- 8. Understanding Toric Orthokeratology & Peripheral Curve Design
- 9. Why Peripheral Curves Matter in Toric Ortho-K
- 10. Designing Toric Peripheral Curves: Key Considerations
- 11. 1. Corneal Topography Analysis
- 12. 2. Lens Material & Oxygen Permeability (Dk/t)
- 13. 3. Peripheral Curve power & Asphericity
- 14. 4. Lens Diameter & Base Curve
- 15. Fitting Techniques for Toric Ortho-K with Optimized Peripheral Curves
- 16. Benefits of Optimized Toric Peripheral Curves
Boston, MA – A recent study presented at Academy 2025 reveals that Arise orthokeratology lenses, featuring toric posterior peripheral curves, exhibit remarkable stability and deliver ample vision correction after onyl a single night of wear. The findings suggest a meaningful advancement in overnight vision correction for individuals with myopia and astigmatism.
Enhanced Lens design for Improved Fit and Comfort
The research, conducted across multiple centers, involved 46 patients, totaling 92 eyes, aged 12 and older. Participants presented with varying degrees of nearsightedness and astigmatism, specifically a spherical equivalent refraction ranging from plano to -5.00 diopters and astigmatism up to 1.50 diopters. The study employed Arise orthokeratology lenses, distinguished by their toric posterior peripheral curves – a design element intended to optimize lens centration, fit, and overall patient comfort.
According to Jennifer S. Harthan, OD, FAAO, FSLS, chief of the Cornea and Contact Lens Center for Clinical Excellence at the Illinois Eye institute, “Using toric peripheral curve systems is going to provide improved centration, improved fit and improved comfort for these patients.” She emphasized that this improved design can lead towards greater success in both vision correction and slowing the progression of myopia.
Impressive results After Initial Wear
The primary outcome of the study focused on the percentage of patients achieving a monocular high-contrast uncorrected distance visual acuity (UDVA) of 0.3 logMAR or better at the three-month mark. An astounding 93.3% of participants met this criterion. Moreover, 80% or more of patients exhibited adequate corneal centration throughout all follow-up visits.
Initial assessments after just one night of lens wear indicated satisfactory lens movement in 87.1% of eyes and 84.8% of patients. Subsequent measurements revealed that 84.4% of eyes achieved refractive stability, 86.7% demonstrated keratometry stability, and 82.2% exhibited UDVA stability between months one and two or months two and three.
“Even after 1 night of wear, the lens was very stable and provided great uncorrected distance visual acuity,” Harthan noted, attributing this success to the innovative toric peripheral curve system.
| Outcome Measure | Percentage of Eyes/Patients |
|---|---|
| UDVA ≥ 0.3 logMAR at Month 3 | 93.3% |
| Adequate Corneal Centration (≥80%) | ≥80% at all visits |
| adequate Lens Movement (after 1 night) | 87.1% of eyes / 84.8% of patients |
| Refractive Stability | 84.4% |
| Keratometry Stability | 86.7% |
| UDVA Stability | 82.2% |
Did You Know? Orthokeratology, also known as Vision Shaping Treatment, involves wearing specially designed contact lenses overnight to temporarily reshape the cornea, reducing or eliminating the need for glasses or contacts during the day.
Pro Tip: Regular follow-up appointments with your eye care professional are vital to monitor the fit and effectiveness of orthokeratology lenses and ensure optimal eye health.
Do you think overnight vision correction will become more mainstream in the coming years? what factors might influence its wider adoption among patients?
The Growing Field of Myopia Management
The increasing prevalence of myopia, especially among children and young adults, has fueled significant research and progress in myopia management strategies. Orthokeratology represents a non-invasive and reversible option for correcting vision and potentially slowing the progression of nearsightedness.According to a 2023 report by the National Eye Institute, approximately 41.9% of U.S. adults ages 40-59 are nearsighted, highlighting the public health importance of effective vision correction solutions.Continued innovation in lens design, material science, and personalized treatment approaches is driving the advancement of myopia management.
Frequently Asked Questions about Orthokeratology
A: Orthokeratology is a non-surgical procedure that uses specially designed contact lenses to reshape the cornea while you sleep, providing clear vision during the day without glasses or contacts.
A: Orthokeratology is generally considered safe when properly fitted and monitored by a qualified eye care professional. Potential risks are similar to those associated with wearing any type of contact lens.
A: Individuals with mild to moderate myopia and astigmatism are typically good candidates for orthokeratology. A comprehensive eye exam is necessary to determine suitability.
A: Orthokeratology lenses are typically worn overnight, every night, to maintain the desired corneal shape.
A: Orthokeratology provides temporary vision correction.If lens wear is discontinued, the cornea will gradually return to its original shape.
A: Research suggests that orthokeratology may help slow the progression of myopia, especially in children and young adults.
Share your thoughts on this exciting development in vision correction in the comments below!
How does ignoring the difference between central and peripheral astigmatism in toric patients affect Ortho-K treatment success?
Toric Peripheral Curves in Ortho-K Lenses: Ensuring Stability and Comfort for Toric Patients
Understanding Toric Orthokeratology & Peripheral Curve Design
Orthokeratology (Ortho-K), or corneal reshaping, is a highly effective vision correction method for myopia and astigmatism. For patients with toric astigmatism, achieving stable and comfortable correction requires specialized lens designs. Central to this is the understanding and application of toric peripheral curves. Unlike spherical Ortho-K lenses, toric lenses address the irregular corneal shape by incorporating different powers in different meridians.however, simply correcting the central cornea isn’t enough. The periphery plays a crucial role in lens stability and overall treatment success.
Why Peripheral Curves Matter in Toric Ortho-K
The peripheral cornea substantially influences lens centration and movement during sleep. In toric patients, the peripheral astigmatism often differs from the central astigmatism. Ignoring this difference can lead to:
* Lens Displacement: An improperly designed peripheral curve can cause the lens to shift off-center, reducing refractive efficacy and possibly causing discomfort.
* reduced treatment Effectiveness: If the peripheral cornea isn’t adequately supported, the desired corneal reshaping may not be fully achieved.
* Increased Corneal Warping: Unstable lenses can induce irregular corneal warping, potentially worsening vision.
* Patient Discomfort: Lens movement and instability can lead to irritation, dryness, and reduced oxygen permeability to the cornea.
Designing Toric Peripheral Curves: Key Considerations
Effective toric peripheral curve design isn’t a one-size-fits-all approach. Several factors must be carefully considered during the fitting process.
1. Corneal Topography Analysis
High-resolution corneal topography is paramount. This mapping provides detailed information about the entire corneal surface, including:
* Central Astigmatism: Magnitude and axis of the central toric error.
* Peripheral Astigmatism: Mapping astigmatism in the mid-peripheral and peripheral zones (typically 6-8mm diameter).This is critical for toric peripheral curve design.
* Corneal Form: Identifying any corneal irregularities or asymmetry.
* Pachymetry Mapping: Assessing corneal thickness variations, wich can influence lens fit.
2. Lens Material & Oxygen Permeability (Dk/t)
The choice of lens material impacts both comfort and corneal health. High Dk/t materials (e.g., silicone hydrogel) are preferred, especially for overnight wear. the material’s modulus also influences lens flexibility and its ability to conform to the corneal surface. Rigid Gas Permeable (RGP) materials remain the standard, but advancements continue to improve oxygen transmissibility.
3. Peripheral Curve power & Asphericity
* Power Adjustment: The power of the peripheral curves must be adjusted to match the peripheral astigmatism identified in the topography map. This frequently enough involves creating different powers in the horizontal and vertical meridians.
* Asphericity: Adjusting the asphericity of the peripheral curves can optimize lens centration and minimize peripheral distortion. This is particularly important for higher degrees of astigmatism.
4. Lens Diameter & Base Curve
* Lens Diameter: A properly sized lens diameter is crucial for stability. Too small, and the lens may decentrate; too large, and it may cause corneal compression.
* Base Curve: the base curve should be carefully selected to provide optimal corneal support and avoid excessive movement.
Fitting Techniques for Toric Ortho-K with Optimized Peripheral Curves
Accomplished fitting requires a systematic approach.
- Initial Lens Selection: based on the topography map and patient refraction, select a trial lens with appropriate central power, toric axis, and estimated peripheral curve parameters.
- Over-Refraction: Perform an over-refraction after overnight wear to assess the treatment effect and identify any residual refractive error.
- Fluorescein Evaluation: Evaluate the fluorescein pattern carefully. Look for:
* Central Clearance: Adequate central clearance for tear exchange.
* peripheral Alignment: Ensure the peripheral curves are aligned with the corneal contours and there is no excessive movement or impingement.
* Apex-Base Relationship: Confirm the lens is not binding or flattening the cornea excessively.
- Refinement & Iteration: Adjust the lens parameters (central power,toric axis,peripheral curve power,asphericity,diameter) based on the over-refraction and fluorescein evaluation. This iterative process may require multiple trial lenses.
Benefits of Optimized Toric Peripheral Curves
* Improved Vision Correction: More accurate and stable correction of toric astigmatism.
* Enhanced Lens Stability: Reduced lens movement and decentration.
* increased Patient Comfort: Minimizes irritation and dryness.
