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Related Experiment Video

Updated: Jun 28, 2025

Author Spotlight: Advancements in Refractive Surgical Correction for Presbyopia and Exploring Postoperative Visual Acuity
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BCLA CLEAR Presbyopia: Evaluation and diagnosis.

James S Wolffsohn1, David Berkow2, Ka Yin Chan3

  • 1School of Optometry, Health and Life Sciences, Aston University, Birmingham, United Kingdom.

Contact Lens & Anterior Eye : the Journal of the British Contact Lens Association
|April 19, 2024
PubMed
Summary

Accurate measurement of the range of clear focus is crucial for presbyopia correction. Combining subjective and objective techniques ensures optimal visual outcomes and patient understanding of treatment options.

Keywords:
AccommodationDefocus curveDiagnosisEvaluationPresbyopiaQuestionnaires

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Area of Science:

  • Ophthalmology
  • Optometry
  • Visual Science

Background:

  • Presbyopia correction requires precise measurement of the range of clear focus.
  • Both subjective and objective methods are essential for evaluating visual performance and optimizing correction.
  • Accurate diagnosis, excluding other visual conditions, is critical for patient adaptation.

Purpose of the Study:

  • To highlight the importance of measuring the range of clear focus in clinical practice.
  • To emphasize the necessity of both subjective and objective techniques for presbyopia correction.
  • To guide clinicians in selecting and optimizing presbyopia correction strategies.

Main Methods:

  • Subjective techniques: patient-reported outcomes, defocus curves.
  • Objective techniques: autorefraction, corneal topography, lens imaging.
  • Careful execution of visual performance and adverse effect assessments, considering target size, contrast, and illumination.

Main Results:

  • Objective techniques offer greater reliability and can explain subjective findings.
  • Imaging serves as an effective tool for patient communication regarding treatment outcomes.
  • Contact lens trials can simulate the effects of permanent corrections like IOLs or refractive surgery.

Conclusions:

  • A comprehensive approach combining subjective and objective measures is vital for effective presbyopia management.
  • Objective data aids in understanding optical performance and guiding treatment adjustments.
  • Informed patient choices are facilitated by trialing optical solutions prior to permanent interventions.