研究目的
To provide a comprehensive guide on the fitting techniques, materials, and principles for rigid gas permeable corneal and corneoscleral lenses.
研究成果
RGP lenses are essential in contact lens practice, offering advantages in vision, physiology, and safety for certain conditions. Proper fitting, material selection, and aftercare are crucial for success, and even small improvements in fit can significantly enhance comfort and patient satisfaction.
研究不足
The chapter is a clinical guide and does not present original research, so it may not address all individual patient variations or recent advancements beyond its publication date. It relies on established practices and may have limitations in generalizability to all cases.
1：Experimental Design and Method Selection:
The chapter is a review and guide, not an experimental study, so it does not involve a specific experimental design or methods. It is based on clinical practices and existing knowledge in optometry.
2：Sample Selection and Data Sources:
No specific samples or datasets are used; it references general clinical experience and literature.
3：List of Experimental Equipment and Materials:
Not applicable as it is not an experimental paper.
4：Experimental Procedures and Operational Workflow:
Describes fitting procedures, assessment techniques (e.g., fluorescein patterns), and lens design considerations.
5：Data Analysis Methods:
Not applicable; it is descriptive and instructional.
独家科研数据包，助您复现前沿成果，加速创新突破
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Medmont E300
E300
Medmont
Corneal topography device used to measure corneal shape and parameters for lens fitting.
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Burton lamp
Hand UV lamp for assessing fluorescein patterns in contact lens fitting.
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Slit-lamp
Ophthalmic instrument for examining the eye, used with blue light and filters to view fluorescein patterns.
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Wratten filter
No. 47 and No. 12
Wratten
Filters used with light sources to enhance fluorescence in fluorescein pattern assessment.
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Fluorescein sodium
2% solution
Dye used to color tears for assessing contact lens fit under UV or blue light.
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Local anaesthetic
Proxymetacaine hydrochloride 0.5% or Oxybuprocaine hydrochloride
Used to reduce reflex tearing and discomfort during initial lens fitting assessments.
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Hydrogen peroxide
3% solution
Disinfecting solution for RGP lenses, effective against contaminants including HIV virus.
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Enzymatic cleaner
Progent
Menicon
Cleaner for removing protein deposits from RGP lenses, used weekly to monthly.
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Abrasive cleaner
Cleaner for RGP lenses that uses friction to remove deposits, but can cause lens thinning if overused.
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RGP lens materials
e.g., Boston II, Boston ES, Fluoroperm 30, Boston EO/7, Contamac, Boston XO, Quantum 2, Paragon HDS100, Optimum Extreme, Silperm 125, Boston XO2, Fluoroperm 151, Menicon Z
Various (e.g., Boston, Fluoroperm, Menicon)
Materials used for manufacturing rigid gas permeable contact lenses, with varying oxygen permeability and properties.
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Novalens
Ocutec Ltd
RGP lens with hydrophilic surface treatment for improved wettability and comfort.
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Aquasil
Aquaperm
Silicone-acrylate copolymer lens with surface treatment to produce a thin pHEMA layer for wettability.
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Menicon Super-EX
Super-EX
Menicon
Surface-modified fluorosilicone-acrylate RGP lens with high Dk value, contraindicated for dry eye.
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SEED S-1
S-1
Seed Co., Japan
RGP lens with polyethylene glycol grafted onto surface for hydrophilicity and contamination resistance.
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Hybrid FS Plus
FS Plus
Contamac
RGP material with hydrophilic monomer incorporated for wettability, can be machined and modified.
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Tyro-97
97
Lagado Corporation
RGP material with hydrophilic monomer for improved surface properties.
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Comfort O2 lens
O2
David Thomas, UK
Rigid silicone hydrogel polymer lens that hydrates on surface while remaining rigid internally.
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SO2 Clear
Clear
Art Optical
Corneoscleral lens design that clears corneal apex and gives glancing touch at limbal area.
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Rose K XL
XL
Rose K
Corneoscleral lens for keratoconus and other conditions, fitted with central alignment and peripheral touch.
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Limbal Lift Lens
Australian Contact Lenses
Corneoscleral lens that vaults limbus without scleral support, acting as a lid attachment design.
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