Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 1991;229(3):294-6.
doi: 10.1007/BF00167888.

The increasing sclerosis of the human lens with age and its relevance to accommodation and presbyopia

H Pau  1 , J Kranz
Affiliations

The increasing sclerosis of the human lens with age and its relevance to accommodation and presbyopia

H Pau et al. Graefes Arch Clin Exp Ophthalmol. 1991.

Abstract

By means of a fine conical probe and a miniature dynamometer, the resistance to penetration of different lens layers was measured. In clear human lenses the power of resistance of the lens nucleus increases with age, mostly due to the "hardening" of the nucleus. A distinct hardening of the nucleus as opposed to the cortex has been found to occur in lenses as young as 20 years of age. This "firmness" of the lens nucleus, occurring between the ages of 20 and 60 years, coincides with the decrease in accommodation range and the onset of presbyopia.

PubMed Disclaimer

References

    1. Klin Monbl Augenheilkd Augenarztl Fortbild. 1952;121(2):205-15 - PubMed
    1. Albrecht Von Graefes Arch Ophthalmol. 1950;150(3-4):340-57 - PubMed
    1. J Physiol. 1971 Jan;212(1):147-80 - PubMed

Publication types

LinkOut - more resources