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Lens epithelium in senile cataract

S H Tseng¹, J S Yen, H L Chien

¹Department of Ophthalmology, National Cheng Kung University Hospital, Tainan, Taiwan, R.O.C.

Journal of the Formosan Medical Association = Taiwan Yi Zhi

|February 1, 1994

Summary

The human lens epithelium

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Area of Science:

Ophthalmology
Cell Biology
Gerontology

Background:

Cataractogenesis is a complex process.
The role of the lens epithelium in cataract development requires further elucidation.
Senile cataracts are the most common form of age-related vision impairment.

Purpose of the Study:

To investigate the relationship between lens epithelial cell density and senile cataract formation.
To determine if specific cataract types are associated with significant changes in lens epithelial cell density.
To elucidate the potential role of a compromised lens epithelium in the progression of cataracts.

Main Methods:

Analysis of 126 human lens epithelium flat preparations obtained via endocapsular cataract extraction.
Quantification of lens epithelial cell density (LECD) in cells/mm².
Statistical comparison of LECD across different age groups, sexes, and cataract types (cortical, nuclear, posterior subcapsular).

Main Results:

The mean lens epithelial cell density (LECD) was 3,683 ± 655 cells/mm².
No significant differences in LECD were observed concerning age and sex (p > 0.05).
A significant reduction in LECD (2,857 cells/mm²) was noted in advanced cataracts, with no significant differences among pure cortical, nuclear, and posterior subcapsular types.

Conclusions:

A compromised lens epithelium, characterized by reduced cell mass and decreasing LECD, is implicated in senile cataractogenesis.
A vicious cycle may exist where diminishing lens epithelial cells contribute to further cataract formation.
The status of the lens epithelium is crucial in the development and progression of senile cataracts.

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