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Related Experiment Videos

Studies on contact lens materials.

H Alyanak1, S Aksoy, N Hasirci

  • 1Middle East Technical University, Faculty of Arts & Sciences, Department of Chemistry, Ankara, Turkey.

The International Journal of Artificial Organs
|February 1, 1991
PubMed
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New polymers based on polymethyl methacrylate were developed for improved contact and intra-ocular lenses. These materials offer tunable optical and physical properties for vision correction applications.

Area of Science:

  • Ophthalmic materials science
  • Polymer chemistry
  • Biomedical engineering

Background:

  • Plastics with glass-like optical properties are crucial for contact lenses and intra-ocular lenses.
  • Continuous research aims to enhance these polymeric materials, but findings are often patented and scarce in literature.

Purpose of the Study:

  • To develop novel co- and terpolymers based on polymethyl methacrylate (PMMA).
  • To investigate the optical and physical properties of these new polymeric materials for ophthalmic applications.
  • To explore theoretical calculations for linear expansion and oxygen permeation.

Main Methods:

  • Polymethyl methacrylate (PMMA) was used as the base material.
  • Co- and terpolymers were synthesized using 2-hydroxyethyl methacrylate, N-vinyl-2-pyrrolidinone, hexamethyl disiloxane, and polypropylene glycol.

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  • Key properties including transparency, refractive index, contact angle, density, equilibrium water content, and hydration were evaluated.

    • Main Results:

    • The synthesized co- and terpolymers exhibited varying optical and physical characteristics.
    • Transparency, refractive index, and water content were measured to assess suitability for lenses.
    • Density and hydration data were utilized for theoretical calculations of linear expansion and oxygen permeation.

    Conclusions:

    • The study successfully synthesized and characterized novel PMMA-based copolymers and terpolymers.
    • These materials demonstrate potential for use in advanced contact lens and intra-ocular lens designs.
    • Further research could optimize these polymers for specific ophthalmic performance requirements.