Related Experiment Videos
Crystalline lens optical dysfunction through aging
Jorge L Alió1, Patricia Schimchak, Herminio P Negri
1Research, Development, and Innovation Department, VISSUM, Instituto Oftalmológico de Alicante, Alicante, Spain. jlalio@vissum.com
Ophthalmology
|September 27, 2005
Summary
Aging crystalline lenses show increased thickness and density, leading to reduced optical quality. These changes impact vision and may necessitate lens replacement even without cataracts.
Area of Science:
- Ophthalmology
- Optical Physics
- Gerontology
Background:
- The crystalline lens undergoes significant changes with age, affecting visual function.
- Understanding these age-related optical and densitometric alterations is crucial for diagnosing and managing visual impairments.
Purpose of the Study:
- To investigate the optical and densitometric modifications in the human crystalline lens associated with aging.
- To correlate these changes with age-related visual performance degradation.
Main Methods:
- A cross-sectional study involving 72 patients aged 8-80 years with clear lenses and good visual acuity.
- Measurements included lens thickness, optical density, modulation transfer function (MTF), and intraocular aberrations (high-order aberrations, spherical aberration, coma).
Main Results:
- Lens thickness and nucleus density (embryonic, anterior, posterior fetal) positively correlated with age.
- Intraocular high-order aberrations (HOAs) and spherical aberration increased with age, while coma aberration decreased.
- Optical quality, measured by 0.1 MTF, significantly decreased with increasing age.
Conclusions:
- Aging leads to a decline in crystalline lens optical quality, driven by morphological changes like increased thickness and density.
- These findings are clinically relevant for considering lens replacement strategies in aging individuals, even in the absence of visually significant cataracts.