Report Description Table of Contents Scleral Lens Market: Advancing Specialty Ocular Devices for Complex Vision Rehabilitation and Ocular Surface Care The Global Scleral Lens Market was valued at USD 352 million in 2025 and is projected to reach USD 708 million by 2032, growing at a CAGR of 10.5% during 2026–2032, according to Strategic Market Research. Scleral lenses are customized rigid gas-permeable lenses that vault over the cornea and rest on the sclera. Unlike conventional contact lenses that primarily correct refractive error, scleral lenses create a fluid-filled reservoir over the corneal surface, making them commercially relevant for patients with irregular corneas, keratoconus, post-surgical corneal irregularity, and difficult ocular-surface conditions. Demand is rising as more eye-care specialists gain experience in scleral lens fitting, while digital measurement tools improve customization for patients with complex corneal conditions who may otherwise require or delay surgery. The market is supported by FDA-cleared therapeutic systems such as the PROSE platform (HDE-cleared) and other Class II scleral lens designs, alongside emerging wavefront-guided and digitally manufactured lenses aimed at improving visual outcomes and ocular-surface care. Scleral lenses work by vaulting the cornea and creating a fluid-filled reservoir that protects and hydrates the eye while correcting irregular corneal optics. Product innovation is increasingly focused on smaller diameters, better landing-zone customization, higher-order aberration correction, and more efficient fitting processes. Why Is Scleral Lens Fitting Moving From a Small Specialty Niche Toward Higher-Volume Practice? The strongest current utilization signal comes from the 2025 SCOPE international survey, which received 892 responses across 60 countries. The dataset represented 462,272 scleral lens fits, 53% more than the 248,828 fits reported in the 2020 survey. More important commercially, practitioners fitting at least 500 lenses increased to 26% of respondents in 2025 from 12% in 2020 and 4% in 2015, while clinicians fitting ten or fewer lenses declined to 7%. The pattern indicates that scleral lens care is increasingly concentrating within experienced practices that can support greater patient throughput and repeat fitting activity. Corneal irregularity remains the principal demand base. SCOPE 2025 reported a median 80% of scleral fits for corneal irregularity. This is a clinical fitting distribution rather than a market-revenue share, but it provides useful evidence that the commercial base remains closely tied to keratoconus, ectasia, post-surgical irregularity, and other conditions for which ordinary spectacle or conventional contact-lens correction may be insufficient. The practitioner ecosystem has also matured considerably from the earlier SCOPE studies. The original 2015 SCOPE prescribing study generated responses from 723 practitioners who had fitted at least five scleral-lens patients, establishing how rapidly a formal specialty-lens community was developing. The latest survey suggests that the next phase is less about introducing clinicians to scleral lenses and more about increasing volume, standardizing fitting practices, and improving efficiency within established centers. This matters for manufacturers because a scleral lens is not sold through the same high-volume replenishment model as a daily disposable contact lens. A tertiary-care study found an average scleral lens replacement period of 23.9 months, or about 1.99 years. Revenue expansion therefore depends heavily on adding new wearers, increasing the number of trained fitters, shortening difficult fitting cycles, expanding suitable indications, and creating meaningful upgrades in design and optics rather than relying on frequent routine replacement. How Is Keratoconus Creating a Durable Patient Base Without Making Scleral Lenses Dependent on Surgery Volumes? Keratoconus remains one of the most important addressable conditions because the diagnosed population is larger in several modern datasets than older epidemiological assumptions suggested. A large U.S. vision-insurance database estimated keratoconus prevalence at 0.15% among enrolled members. A nationwide Dutch insurance study involving approximately 4.4 million people estimated prevalence at 265 per 100,000, or about 1 in 375, with annual incidence of 13.3 per 100,000 in the relevant age group. The variation between studies also shows why a single global patient estimate should not be applied indiscriminately across countries. The commercial relationship between scleral lenses and corneal cross-linking is particularly important. Cross-linking is intended to address disease progression, whereas specialty lenses remain important for visual rehabilitation when corneal shape is already irregular. Greater cross-linking activity can therefore preserve rather than eliminate a long-term contact-lens population, because stabilizing an ectatic cornea does not automatically remove its irregular optics. Australia provides strong real-world evidence of this changing care pathway. A 2026 national utilization analysis found that keratoconus-related corneal grafts declined from 3,170 during 2001–2010 to 2,797 during 2011–2020, while cross-linking and rigid/scleral lens use increased. Within Australian rigid gas-permeable fitting, scleral lenses rose from 8% of RGP fits in 2015 to 41% in 2022. The estimated number of RGP and scleral lenses sold for keratoconus also doubled over three decades. Rather than scleral lenses disappearing as cross-linking expands, the Australian experience points toward a combined pathway of earlier disease stabilization and longer-term non-surgical visual rehabilitation. The resulting market opportunity is not simply a function of keratoconus prevalence. It depends on how many diagnosed patients move through specialist referral, remain unsuitable for ordinary spectacles or softer lens modalities, have access to experienced fitters, and can afford or obtain coverage for customized lenses. How Do Patient Handling, Fogging, and Cost Limit Conversion From Successful Fitting to Long-Term Wear? Scleral lenses can generate strong clinical value yet still lose patients during the transition from fitting to routine daily wear. A prospective one-year study reported a 73% overall scleral-lens wear success rate, with handling problems and discomfort identified as the main reasons patients discontinued. Commercially, this makes application/removal training, practitioner follow-up, lens diameter, fit refinement, and patient-support services part of retention economics rather than peripheral clinical services. Midday fogging remains another meaningful friction point. In a study of therapeutic contact-lens users with dry eye, annual self-reported out-of-pocket spending among scleral-lens wearers averaged USD 3,019, while lenses and contact-lens solutions accounted for an average USD 2,244. The same patient-experience research found substantial ongoing management burden among scleral wearers. These figures are not general market prices and should not be extrapolated to every patient, but they illustrate why affordability and maintenance requirements can affect persistence even when the lens provides meaningful visual or ocular-surface benefit. More recent research also continues to identify midday fogging as a practical issue in established scleral wear. This creates commercial value for better landing-zone alignment, optimized clearance, improved fitting measurement, appropriate filling solutions, and designs that reduce the need for repeated removal and reapplication during the day. Why Does the UK Offer a Different Access Model for Specialty Contact Lenses? The UK demonstrates how hospital-based specialty-lens care can reduce direct patient charges while maintaining strict clinical gatekeeping. From 1 April 2025, the NHS Hospital Eye Service maximum charge remained £61.77 per contact lens, with the same value applying to the relevant NHS contact-lens voucher category. At Leeds Teaching Hospitals NHS Trust, the specialty contact-lens service provides assessment, fitting, prescribing, and aftercare for clinically necessary lenses, including therapeutic and keratoconic lenses. The hospital states that a consultant ophthalmologist or hospital contact-lens practitioner determines clinical need and reports the same £61.77 per-lens patient charge. It also notes that patients are not normally fitted through this pathway when adequate driving-level vision can be obtained using spectacles. This creates a different demand pathway from much of the U.S. private market. Patient access can be supported by public ophthalmic services, but utilization is filtered through clinical eligibility and specialist capacity. BostonSight's partnership with Moorfields Eye Hospital NHS Foundation Trust provides a commercial example of how manufacturers can participate in that model. Under the agreement, Moorfields manufactures and distributes BostonSight SCLERAL through the NHS in the UK while the organizations collaborate on practitioner and patient education. Local manufacturing and clinical training can be as important as conventional distribution when a specialty device depends heavily on practitioner expertise. How Is the Scleral Lens Market Structured? Lens Type Dynamics: Mini-Scleral Dominance Meets Full Scleral Acceleration in Complex Ocular Care Smaller-diameter or mini-scleral lenses represented the larger segment in 2025, accounting for 57.0% of the market and USD 200.64 million, and are projected to expand at a 9.94% CAGR. Their larger revenue position reflects their suitability across a broad range of irregular-cornea and specialty vision cases, combined with easier handling for some patients and greater fitting flexibility in eyes where very large diameters may be unnecessary. Full scleral lenses accounted for the remaining 43.0%, equivalent to USD 151.36 million in 2025, and are projected to grow faster at a CAGR of 11.22%. Their higher growth rate reflects increasing use in more complex corneal and ocular-surface conditions where greater corneal vault, fluid-reservoir capacity, and broader scleral landing can provide clinical advantages. Application Landscape: Irregular Cornea Dominance and Rapid Expansion of Therapeutic Ocular Surface Use Irregular Corneal Conditions, this segment remained the largest revenue contributor in 2025, accounting for a 55.0% share and USD 193.60 million in market size. It is primarily driven by conditions such as keratoconus, corneal ectasia, and post-surgical corneal irregularities, where the corneal shape is highly distorted and cannot be adequately corrected with standard spectacles or soft contact lenses. Scleral lenses are widely used in these cases because they vault over the irregular cornea and create a smooth optical surface, significantly improving visual acuity. This segment is projected to grow at a 9.31% CAGR, supported by increasing diagnosis rates and earlier intervention in corneal disease management. Ocular Surface Disease, this segment represented 30.0% of the market, or USD 105.60 million in 2025. It includes severe dry eye disease, Sjögren syndrome, graft-versus-host disease, and other conditions where the ocular surface is compromised and unstable. In these cases, scleral lenses are used not only for vision correction but also as a therapeutic device, as the fluid reservoir helps protect and hydrate the cornea throughout the day. This segment is expected to grow at the fastest rate, with a 12.49% CAGR, driven by increasing recognition of scleral lenses as a treatment option for advanced dry-eye and ocular-surface disorders. Refractive Error, this segment accounted for 15.0% of the market, or USD 52.80 million in 2025, and is projected to grow at a 10.50% CAGR. Although refractive errors are typically managed with glasses or standard contact lenses, scleral lenses are used in more complex cases where conventional correction does not provide sufficient visual quality. This includes patients with high astigmatism, irregular refractive profiles, or those who experience poor tolerance to other lens types. Growth in this segment is supported by increasing demand for high-definition visual correction in specialty and hard-to-fit refractive cases. Specialty Care Networks Driving Scleral Lens Adoption Across End-User Segments Specialty optometry practices were the largest channel in 2025, accounting for 40.0% of the market with USD 140.80 million in revenue, and are projected to grow at the fastest end-user CAGR of 11.27%. This dominance is driven by the fact that scleral lens fitting is highly specialized and is most efficiently managed by experienced optometrists who handle complex customization, iterative fitting adjustments, patient follow-ups, troubleshooting issues such as fogging or discomfort, and ongoing lens reordering. These practices often serve as the primary point of long-term scleral lens care. Corneal & contact lens centers held a 32.0% market share, valued at USD 112.64 million in 2025, and are expected to grow at a 10.50% CAGR. These centers typically operate as referral hubs, receiving patients with keratoconus, post-surgical corneal irregularities, and other complex vision disorders from general eye-care providers. Their structured clinical environment and access to specialized diagnostic tools make them well-suited for managing difficult fitting cases that require advanced expertise. Tertiary eye hospitals represented 18.0% of the market, or USD 63.36 million in 2025, and are projected to grow at a 9.60% CAGR. These institutions play a critical role in treating advanced corneal and ocular-surface diseases that often require multidisciplinary care involving cornea specialists, ophthalmologists, and contact-lens experts. They are particularly important for severe cases where scleral lenses are used as part of broader therapeutic management rather than standalone vision correction. Academic ophthalmology centers accounted for the remaining 10.0% of the market, valued at USD 35.20 million in 2025, and are expected to grow at an 8.85% CAGR. These centers are primarily involved in complex case management, clinical research, and training the next generation of eye-care professionals. They also play a key role in evaluating and adopting emerging scleral lens technologies, including advanced fitting systems and optical innovations, which later influence broader clinical practice. Where Are the Strongest Regional Demand Signals? North America has one of the most developed specialty-lens practice ecosystems and a comparatively visible reimbursement structure, accounting for a 44.0% market share valued at USD 154.88 million in 2025 and projected to grow at a CAGR of 9.00%. The 2025 SCOPE survey was heavily represented by U.S. practitioners, while the U.S. keratoconus insurance study estimated prevalence at 0.15% among VSP enrollees. New higher-order-aberration products, specialty fitting systems, PROSE networks, and established HCPCS pathways provide commercial infrastructure for both irregular-cornea and severe ocular-surface applications. Europe combines specialist private practices with public health-system channels, accounting for a 27.0% market share valued at USD 95.04 million in 2025, and is projected to grow at a CAGR of 9.90%. The Dutch population study's keratoconus prevalence of 265 per 100,000 demonstrates a meaningful diagnosed pool, while the UK NHS pathway shows how specialty contact lenses can be integrated into hospital ophthalmology. Partnerships such as BostonSight–Moorfields and BostonSight's European licensing arrangements also show suppliers localizing manufacturing, distribution, and education rather than depending only on cross-border product shipment. Asia-Pacific presents a strong expansion opportunity where keratoconus detection and specialist contact-lens capacity are increasing. Australia provides the clearest utilization evidence: scleral lenses increased from 8% to 41% of RGP fits between 2015 and 2022, while RGP and scleral lens use increased alongside cross-linking and declining keratoplasty volumes. This is a useful indicator of how specialty-lens penetration can grow as modern corneal management moves toward earlier intervention and long-term visual rehabilitation. The region accounted for 20.0% of the global market, valued at USD 70.40 million, and is projected to grow at a CAGR of 14.08%, reflecting strong expansion potential driven by improving diagnosis rates and increasing adoption of specialty contact lenses. Latin America accounted for 5.0% of the global market, valued at USD 17.60 million in 2025, and is projected to grow at a CAGR of 10.50%. Growth in the region is supported by gradual expansion of specialty optometry and ophthalmology services, increasing awareness and diagnosis of keratoconus, and improving access to custom contact lens manufacturing, particularly in Brazil, Mexico, and Argentina. Adoption of scleral lenses is rising in tertiary eye-care and private specialty clinics, where practitioners are increasingly managing complex corneal irregularities without immediate surgical intervention. However, market penetration remains uneven due to limited reimbursement coverage, concentration of trained fitters in urban centers, and reliance on imported or centralized manufacturing for advanced scleral lens designs. The Middle East & Africa (MEA) region represents a smaller but steadily expanding segment of the global scleral lens market, accounting for a 4.0% market share, equivalent to USD 14.08 million in 2025, and is projected to grow at a CAGR of 10.50% through 2032. Growth in the region is primarily driven by increasing awareness of keratoconus, improving access to specialty ophthalmic care in urban centers, and gradual expansion of optometry-led contact lens services in countries such as the UAE, Saudi Arabia, South Africa, and select Gulf Cooperation Council (GCC) markets. How Is Competition Shifting From the Lens Alone to the Entire Fitting Ecosystem? Bausch + Lomb Bausch + Lomb is pushing the premium end of the market through Zenlens and advanced optical customization. The 2025 Zenlens CHROMA HOA launch connects wavefront-guided correction with aberrometry, design software, and precision manufacturing. This gives the company a route to capture demand from complex corneal patients whose needs extend beyond conventional refractive correction. BostonSight BostonSight competes through an integrated model combining PROSE treatment, commercially available scleral lenses, fitting software, image-based customization, practitioner education, clinical partnerships, and manufacturing. Its 2026 smaller-diameter expansion and five-year technology roadmap broaden both the addressable patient population and practitioner toolset, while agreements with organizations such as Moorfields extend the model into institutional health systems. CooperVision CooperVision benefits from global practitioner relationships across mainstream and specialty contact lenses. Its BCLA 2025 positioning placed scleral and specialty lenses within a broad portfolio serving complex prescriptions. Its competitive advantage is therefore less dependent on a single scleral platform and more connected to practitioner reach, portfolio breadth, education, and the ability to introduce specialty products to an existing contact-lens customer base. Analyst Perspective: What Will Determine Scleral Lens Market Growth Through 2032? The 10.5% CAGR (2026–2032) is mainly driven by more patients entering scleral lens care and growing clinical capacity, not frequent lens replacement (which averages nearly 2 years). The 53% rise in SCOPE fitting volume (2020–2025) shows this patient base is already expanding. Growth is increasingly supported by better technology. Digital fitting tools, corneoscleral mapping, and advanced designs like Bausch + Lomb’s wavefront-guided Zenlens CHROMA HOA and BostonSight’s expanded fitting system are helping reduce fitting time and improve accuracy. However, scaling still depends on trained providers. Scleral lenses require specialist fitting and follow-up, and SCOPE 2025 shows more high-volume practitioners are emerging as manufacturers invest in training and support. Overall, future growth will favor companies that combine advanced lens design, digital fitting systems, strong practitioner support, and reimbursement-aware care models, as these factors will determine how much demand converts into sustained use through 2032. Scleral Lens Market Report Coverage Table Report Attribute Details Forecast Period 2026 – 2032 Market Size Value in 2025 USD 352 Million Revenue Forecast in 2032 USD 708 Million Overall Growth Rate CAGR of 10.5% (2026 – 2032) Base Year for Estimation 2025 Historical Data 2019 – 2024 Unit USD Million, CAGR (2026 – 2032) Segmentation By Lens Type, By Application, By End User, By Geography By Lens Type Full Scleral Lenses, Smaller-Diameter/Mini-Scleral Lenses By Application Irregular Corneal Conditions, Ocular Surface Disease, Refractive Error By End User Specialty Optometry Practices, Corneal & Contact Lens Centers, Tertiary Eye Hospitals, Academic Ophthalmology Centers By Region North America, Europe, Asia-Pacific, Latin America, Middle East and Africa Country Scope U.S., Canada, UK, Germany, France, Italy, Netherlands, China, Japan, South Korea, India, Australia, Brazil, Mexico, Saudi Arabia, UAE, South Africa Market Drivers Rising adoption of specialty contact lenses for keratoconus and irregular corneal conditions, increasing use of scleral lenses for ocular surface disease management, growth in specialty optometry and corneal care networks, advancements in digital fitting technologies and customized lens manufacturing Customization Option Available upon request Frequently Asked Question About This Report Q1. How big is the Scleral Lens Market? A1. The Global Scleral Lens Market was valued at USD 352 million in 2025 and is projected to reach USD 708 million by 2032. Q2. What is the CAGR for the Scleral Lens Market during the forecast period? A2. The market is projected to grow at a 10.5% CAGR during 2026–2032. Q3. Which lens type had the largest market share in the Scleral Lens Market? A3. Smaller-Diameter/Mini-Scleral Lenses led the market with a 57.0% share in 2025, representing USD 200.64 million. Q4. What are the key factors driving the growth of the Scleral Lens Market? A4. Growth is supported by rising keratoconus diagnosis, greater use in ocular surface disease, improved digital fitting tools, and a growing base of trained specialty lens practitioners. Q5. Which region holds the largest Scleral Lens Market share? A5. North America held the largest share at 44.0% in 2025, equivalent to USD 154.88 million. Sources: Scleral Lens Fitting, Clinical Demand & Patient Base Scleral Lens Fitting Trends: SCOPE 2025 Estimated Prevalence of Keratoconus in the United States Average Scleral Lens Replacement Period at a Tertiary Care Hospital Reimbursement, Coverage & Patient Access CMS — Eye Prostheses / PROSE Policy Article A52462 Aetna — Contact Lenses and Eyeglasses Clinical Policy Bulletin 0126 GOV.UK — NHS Optical Voucher Values and Hospital Eye Service Charges from April 2025 Regional Adoption & Keratoconus Management Trends in the Management of Keratoconus in Australia Age-Specific Incidence and Prevalence of Keratoconus in the Netherlands Leeds Teaching Hospitals — Contact Lens Services Competitive Landscape & Product Innovation Bausch + Lomb — Zenlens CHROMA HOA U.S. Launch BostonSight — Smaller-Diameter Scleral Lens Expansion CooperVision — BCLA 2025 Specialty Lens Portfolio Table of Contents - Global Scleral Lens Market Report (2026–2032) Executive Summary Market Overview Market Attractiveness by Lens Type, Application, End User, and Region Strategic Insights from Key Executives (CXO Perspective) Historical Market Size and Volume (2019–2024) Base Year Market Size Analysis (2025) Market Size and Volume Forecasts (2026–2032) Summary of Market Segmentation by Lens Type, Application, End User, and Region Market Share Analysis Leading Players by Revenue and Market Share Market Share Analysis by Lens Type, Application, and End User Investment Opportunities in the Scleral Lens Market Key Developments and Innovations Mergers, Acquisitions, and Strategic Partnerships High-Growth Segments for Investment Opportunities in Mini-Scleral Lenses, Full Scleral Lenses, Digital Fitting Systems, Wavefront-Guided Designs, Corneal Rehabilitation, and Ocular Surface Care Applications Market Introduction Definition and Scope of the Study Market Structure and Key Findings Overview of Top Investment Pockets Strategic Importance of Scleral Lenses in Complex Vision Rehabilitation, Irregular Corneal Management, and Ocular Surface Disease Care Research Methodology Research Process Overview Primary and Secondary Research Approaches Market Size Estimation and Forecasting Techniques Data Triangulation and Segment-Level Forecasting Approach Market Dynamics Key Market Drivers Challenges and Restraints Impacting Growth Emerging Opportunities for Stakeholders Impact of Specialty Contact Lens Regulations, Clinical Guidelines, Reimbursement Policies, and Patient Access Models Role of Keratoconus Management, Ocular Surface Disease Treatment, Digital Measurement Tools, and Specialty Eye-Care Networks in Market Expansion Practitioner Training, Fitting Efficiency, Patient Retention, Lens Customization, and Advanced Optical Design Trends Global Scleral Lens Market Analysis Historical Market Size and Volume (2019–2024) Base Year Market Size Analysis (2025) Market Size and Volume Forecasts (2026–2032) Market Analysis by Lens Type: Full Scleral Lenses Smaller-Diameter/Mini-Scleral Lenses Market Analysis by Application: Irregular Corneal Conditions Ocular Surface Disease Refractive Error Market Analysis by End User: Specialty Optometry Practices Corneal & Contact Lens Centers Tertiary Eye Hospitals Academic Ophthalmology Centers Market Analysis by Region: North America Europe Asia-Pacific Latin America Middle East & Africa Regional Market Analysis North America Scleral Lens Market Analysis Historical Market Size and Volume (2019–2024) Base Year Market Size Analysis (2025) Market Size and Volume Forecasts (2026–2032) Market Analysis by Lens Type, Application, and End User Country-Level Breakdown: United States Canada Mexico Europe Scleral Lens Market Analysis Historical Market Size and Volume (2019–2024) Base Year Market Size Analysis (2025) Market Size and Volume Forecasts (2026–2032) Market Analysis by Lens Type, Application, and End User Country-Level Breakdown: United Kingdom Germany France Netherlands Rest of Europe Asia Pacific Scleral Lens Market Analysis Historical Market Size and Volume (2019–2024) Base Year Market Size Analysis (2025) Market Size and Volume Forecasts (2026–2032) Market Analysis by Lens Type, Application, and End User Country-Level Breakdown: Australia Japan China India Rest of Asia-Pacific Latin America Scleral Lens Market Analysis Historical Market Size and Volume (2019–2024) Base Year Market Size Analysis (2025) Market Size and Volume Forecasts (2026–2032) Market Analysis by Lens Type, Application, and End User Country-Level Breakdown: Brazil Mexico Argentina Middle East & Africa Scleral Lens Market Analysis Historical Market Size and Volume (2019–2024) Base Year Market Size Analysis (2025) Market Size and Volume Forecasts (2026–2032) Market Analysis by Lens Type, Application, and End User Country-Level Breakdown: Saudi Arabia United Arab Emirates South Africa Rest of Middle East & Africa Competitive Intelligence and Benchmarking Leading Key Players: Bausch + Lomb BostonSight CooperVision Euclid Systems Corporation Visionary Optics SynergEyes Art Optical Contact Lens AccuLens Competitive Landscape and Strategic Insights Benchmarking Based on Lens Customization Capability, Digital Fitting Technology, Practitioner Support, Manufacturing Expertise, Clinical Partnerships, and Regional Presence Supplier Qualification and Specialty Lens Production Capability Analysis Mini-Scleral and Full Scleral Lens Positioning Irregular Cornea and Ocular Surface Disease Treatment Competitiveness Digital Mapping, Wavefront-Guided Design, Training Programs, and Specialty Care Network Strategy Analysis Appendix Abbreviations and Terminologies Used in the Report References and Sources List of Tables Market Size by Lens Type, Application, End User, and Region (2026–2032) Regional Market Breakdown by Segment Type (2026–2032) Competitive Benchmarking of Leading Vendors Clinical Adoption and Patient Access Analysis Technology Adoption Trends Across Digital Fitting Systems, Wavefront-Guided Designs, Custom Manufacturing, and Specialty Lens Platforms List of Figures Market Drivers, Challenges, Opportunities, and Restraints Regional Market Snapshot Competitive Landscape by Market Share Growth Strategies Adopted by Key Players Market Share by Lens Type, Application, and End User (2025 vs. 2032) Global Scleral Lens Ecosystem and Value Chain Analysis