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The Jackson crossed cylinder: historical perspective
1Southern California College of Optometry, Fullerton 92631-1699.
Journal of the American Optometric Association
|May 1, 1993
Summary
The Jackson crossed cylinder lens, used for over a century, remains a key tool for measuring astigmatism in clinical refraction. This review traces its historical development and ongoing evaluation of its effectiveness.
Area of Science:
- Ophthalmology
- Optometry
- Vision Science
Background:
- The crossed cylinder lens has been a cornerstone of clinical refraction for over 100 years.
- Despite ongoing scrutiny, it persists as the primary method for astigmatism assessment.
Observation:
- This paper presents a historical review of the Jackson crossed cylinder technique.
- The review spans from the mid-19th century to the present day.
Findings:
- The study examines the historical utilization of the crossed cylinder lens in clinical practice.
- It also addresses the historical efforts to validate and assess the reliability of this refractive technique.
Implications:
- Understanding the historical context of the Jackson crossed cylinder is crucial for current optometric and ophthalmologic practices.
- Further evaluation of its validity and reliability informs best practices in astigmatism correction.