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Progressive addition and variable focus lenses: a review.

C M Sullivan1, C W Fowler

  • 1Department of Vision Sciences, Aston University, Birmingham, UK.

Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)
|January 1, 1988
PubMed
Summary
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This review covers new designs for progressive addition spectacle lenses and variable focus systems. It builds on historical research, comparing recent patents in lens technology.

Area of Science:

  • Optometry and Vision Science
  • Optical Engineering

Background:

  • Reviews historical advancements in progressive addition spectacle lenses and variable focus systems.
  • Builds upon seminal analytical work by von Rohr (1916), Graham (1942), and Bennett (1970).

Purpose of the Study:

  • To review recent developments in progressive addition spectacle lenses and variable focus lens systems design.
  • To provide a comparative assessment of the latest patents in these fields.

Main Methods:

  • Literature review focusing on recent patent filings.
  • Comparative analysis of patented designs for progressive addition and variable focus lenses.
  • Primarily descriptive approach due to the nature of patent literature.

Main Results:

Related Experiment Videos

  • Identifies and summarizes key recent innovations in progressive addition lens technology.
  • Highlights emerging trends and design strategies in variable focus lens systems.
  • Provides a comparative overview of current patent landscape in spectacle lens design.

Conclusions:

  • Recent patents indicate significant progress in spectacle lens technology.
  • The field continues to evolve, building on established optical principles.
  • Further research may benefit from integrating mathematical models with patent analysis.