Clinical Report: Online Photo Diagnosis: Scleral Lens Fitting on PMD

Overview

This report discusses the successful fitting of a scleral lens for a patient with pellucid marginal degeneration (PMD) after previous unsuccessful attempts. The tailored design incorporated microvaults and ventilation, leading to improved comfort and wear time.

Background

Pellucid marginal degeneration is a progressive corneal ectasia that can significantly impair vision. Accurate diagnosis and management are crucial, particularly as traditional surgical options may not yield satisfactory results. Scleral lenses have emerged as a primary non-surgical intervention to enhance visual acuity in patients with PMD.

Data Highlights

No numerical data or trial data presented in the article.

Key Findings

• The patient experienced significant discomfort with a previously fitted smaller scleral lens.
• Corneal ectasia progression was observed during the patient's follow-up visit.
• A new scleral lens design provided 150 microns of clearance at the apex, reducing excessive vaulting.
• Incorporation of a posterior oval microvault and non-visible ventilating channels improved oxygen delivery.
• The patient reported comfort and a calm eye after 10 to 12 hours of lens wear with the new design.

Clinical Implications

Tailored scleral lens designs can effectively manage complex cases of PMD, particularly when traditional surgical interventions are not viable. Clinicians should consider the specific parameters of scleral lenses to optimize patient comfort and visual outcomes.

Conclusion

This case underscores the importance of customized scleral lens fitting in managing progressive PMD, highlighting the potential for improved patient outcomes through innovative lens designs.

References

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2. Contact Lens Spectrum, Fitting Scleral Lenses for Ocular Surface Disease, 2011 -- Fitting Scleral Lenses for Ocular Surface Disease
3. Contact Lens Spectrum, Online Photo Diagnosis, 2012 -- Online Photo Diagnosis
4. Corneal Ectasia Preferred Practice Pattern® - PubMed, 2024 -- Corneal Ectasia Preferred Practice Pattern
5. Scleral lenses and PROSE: indications, complications, and future challenges - PMC, 2026 -- Scleral lenses and PROSE
6. Update on pellucid marginal degeneration - PMC, 2026 -- Update on PMD
7. contact lens spectrum — ONLINE PHOTO DIAGNOSIS
8. Corneal Ectasia Preferred Practice Pattern® - PubMed
9. Scleral lenses and PROSE: indications, complications, and future challenges - PMC
10. Update on pellucid marginal degeneration - PMC