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Related Experiment Videos

Nuclear cataract--a microradiographic study.

B M Palmquist1, B Philipson, P Fagerholm

  • 1Department of Ophthalmology, Karolinska Hospital, Stockholm, Sweden.

Acta Ophthalmologica
|December 1, 1988
PubMed
Summary
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Nuclear cataract, a common aging eye condition, shows increased lens nucleus density. Quantitative microradiography revealed localized dry mass variations within the nucleus, offering insights into cataract development.

Area of Science:

  • Ophthalmology
  • Biophysics
  • Materials Science

Background:

  • Nuclear cataract is a prevalent form of age-related vision impairment.
  • It is characterized by nuclear opacity and yellow-brown pigmentation.
  • Understanding the physical properties of the cataractous lens nucleus is crucial.

Purpose of the Study:

  • To quantitatively analyze the dry mass concentration distribution within the nucleus of human senile nuclear cataracts.
  • To investigate the presence and nature of localized formations with altered dry mass within the cataractous lens nucleus.

Main Methods:

  • Quantitative microradiography was employed to assess dry mass concentration.
  • Twenty-one human lenses with varying degrees of nuclear turbidity were analyzed post-intracapsular cataract extraction.

Related Experiment Videos

  • Dry mass concentration was measured along the lens axis.

    • Main Results:

    • The overall dry mass distribution along the lens axis was similar to normal lenses.
    • Dry mass concentration increased from the lens poles to the center, averaging 0.47 g.cm-3.
    • Localized formations with reduced or increased dry mass were identified within the lens nucleus.

    Conclusions:

    • Despite a generally uniform appearance, the cataractous lens nucleus exhibits localized heterogeneities in dry mass.
    • These findings contribute to understanding the structural changes in nuclear cataract.
    • Further investigation into the nature and implications of these formations is warranted.