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Related Experiment Videos

Assessing visual performance with progressive addition lenses.

Arkady Selenow1, Elizabeth A Bauer, Steven R Ali

  • 1Manhattan Vision Associates, Institute for Vision Research, New York, New York 10022, USA. research@visionbylaser.com

Optometry and Vision Science : Official Publication of the American Academy of Optometry
|August 30, 2002
PubMed
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Progressive addition lenses (PALs) showed slightly reduced visual performance compared to single-vision lenses during computer tasks. Tasks requiring wider visual angles and more eye movements were more sensitive to these differences.

Area of Science:

  • Optometry
  • Human Factors Engineering
  • Visual Science

Background:

  • Progressive addition lenses (PALs) have design limitations affecting the field of view at intermediate distances.
  • This restricted view may impact visual performance during computer-based tasks.

Purpose of the Study:

  • To compare the visual performance of PALs versus single-vision lenses.
  • To assess performance in a computer workplace environment at intermediate distances.

Main Methods:

  • Adult subjects completed four computer-based reading tasks.
  • Tasks were performed at an intermediate distance (64 cm) using both single-vision and PALs.

Main Results:

  • Single-vision lenses demonstrated significantly better performance in one task.

Related Experiment Videos

  • A trend towards better performance with single-vision lenses was observed in another task.
  • No significant performance differences were found in the remaining two tasks.

    • Conclusions:

    • Visual performance tests sensitive to wide visual angles and fixational shifts are better at differentiating lens performance.
    • PALs exhibited marginally diminished visual performance compared to single-vision lenses.
    • This performance difference is likely due to the restricted intermediate viewing channel in PALs.