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Changes in light scatter and width measurements from the human lens cortex with age
G T Smith1, R C Smith, N A Brown
1Clinical Cataract Research Unit, Nuffield Laboratory of Ophthalmology, Oxford.
Eye (London, England)
|January 1, 1992
Summary
As people age, light scatter in the human lens increases, particularly in the C3 zone. This distinct lens layer appears in the second decade and shows the most significant scatter increase throughout life.
Area of Science:
- Ophthalmology
- Biomedical Optics
- Human Lens Physiology
Background:
- The human lens undergoes age-related changes affecting its optical properties.
- Understanding the anterior cortical layers is crucial for visual optics research.
Purpose of the Study:
- To quantify age-related changes in light scatter and width of human anterior lens cortical zones.
- To investigate the developmental timeline and optical characteristics of specific lens zones.
Main Methods:
- Utilized computerised linear scanning densitometry on Scheimpflug images.
- Analyzed light scatter and width in three major anterior lens zones (C1, C2, C3) from 50 human subjects.
- Correlated measurements with subject age.
Main Results:
- Light scatter significantly increased with age across all three zones, most notably in zone C3.
- Zone C3, appearing in the second decade, exhibited continuous scatter increase throughout life.
- Lens growth primarily occurred in zone C2, while zone C1 tended to decrease in width with age.
Conclusions:
- The anterior lens cortex exhibits distinct age-dependent patterns of light scatter and width.
- Zone C3's increasing scatter properties throughout life are a key factor in age-related visual changes, even without cataract.
- The findings provide insights into human lens development and aging.