Summary of "#ScleralContactLens Fitting Considerations in Different #CornealEctasia | OOLS | Manikanda Devendran"
Video Summary
The video focuses on the fitting considerations for Scleral Contact Lenses in patients with different types of corneal ectasia. Manikanda Devendran, a consultant optometrist, discusses the importance of understanding various factors when fitting scleral lenses, including patient-specific conditions and lens characteristics.
Key Scientific Concepts and Discoveries
- Scleral Contact Lenses: These are large diameter lenses that rest on the conjunctiva and cover the entire cornea, correcting distorted optics due to irregular corneas or ocular surface disorders.
- Types of Scleral Lenses:
- Corneal Lenses: Rest entirely on the cornea.
- Corneoscleral Lenses: Partially on the cornea and partially on the sclera.
- Scleral Lenses: Cover the cornea and rest on the sclera.
- Indications for Scleral Lenses: Include refractive corrections, irregular corneas, ocular surface disorders, etc. There are approximately 62 recognized indications.
- Contraindications: Conditions such as corneal endothelial abnormalities, glaucoma, and overnight wear can complicate scleral lens fitting.
- Fluid Reservoir Thickness: The space between the lens and cornea should be maintained to avoid epithelial damage. Optimal thickness is crucial for comfort and avoiding complications like corneal edema.
- Sagittal Height Selection: The sagittal height of the lens should be carefully calculated based on corneal topography to ensure proper fit and clearance.
- Lens Design Considerations: The choice between quadrant-specific and meridian-specific designs can impact fitting adjustments.
Methodology for Scleral Lens Fitting
- Choosing Lens Diameter:
- Diameter selection is influenced by the practitioner’s assessment of the patient's eyelid tension and corneal condition.
- Use formulas to calculate the total diameter based on various parameters.
- Maintaining Fluid Reservoir Thickness:
- Assess thickness at different intervals post-insertion to ensure adequate clearance and comfort.
- Alignment of Landing Zone:
- Evaluate the inner and outer optics to ensure proper alignment and avoid compression or impingement.
- Edge Lift and Impingement Management:
- Adjust the lens design to alleviate discomfort caused by edge lift or impingement.
- Back Surface Design Decision:
- Choose between quadrant-specific or meridian-specific lenses based on the patient's needs.
Featured Researchers/Sources
- Manikanda Devendran (Presenter)
- Boston Scleral Lens Society (mentioned in context)
- Various literature referenced throughout the presentation regarding scleral lenses and fitting techniques.
This summary encapsulates the main points discussed in the video regarding scleral lens fitting for corneal ectasia, including methodologies and considerations for practitioners.
Category
Science and Nature
