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Several body functions deteriorate with age. The external signs of aging are easily identifiable. For example, the skin becomes dry, less elastic, and thins out, forming wrinkles. The skin of the face begins to appear looser due to a decrease in the levels of elastic and collagen fibers in the connective tissue. Additionally, melanin production in the hair follicle decreases with age, resulting in gray hair. Moreover, the senses of sight and hearing decline, so glasses and hearing aids may...
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As individuals age, their body's physiology evolves, affecting drug pharmacokinetics. The most apparent changes occur in the gastrointestinal tract, where an increase in gastric pH, a delay in gastric emptying, and a reduction in gastrointestinal motility are observed. Remarkably, these changes do not substantially modify the absorption of orally administered drugs, particularly those absorbed via passive diffusion.Transdermal drug delivery emerges as a highly viable method for older adults due...
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Updated: Apr 14, 2026

Full-Field Optical Coherence Microscopy for Histology-Like Analysis of Stromal Features in Corneal Grafts
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[Is the decrease in corneal endothelial cell density in relation to age linear?].

R Beuschel1, T Hofmann1, J Messerli2

  • 1Hochschule Aalen - Technik und Wirtschaft, Aalen (Studiendekan: Prof. Dr. Anna Nagl).

Klinische Monatsblatter Fur Augenheilkunde
|April 23, 2015
PubMed
Summary
This summary is machine-generated.

Corneal endothelial cell density decreases significantly until age 35, then slows. This finding suggests age is not a primary factor for intraocular surgeries.

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Area of Science:

  • Ophthalmology
  • Corneal Science
  • Cell Biology

Context:

  • Corneal transparency relies on endothelial cell density.
  • A continuous decrease in cell density from birth is generally assumed.
  • Understanding age-related changes is crucial for ophthalmic procedures.

Purpose:

  • To analyze the relationship between age and corneal endothelial cell density.
  • To investigate changes in polymegatism and hexagonal cell proportion with age.

Summary:

  • Specular microscopy of 191 healthy eyes revealed an extrapolated endothelial cell density of 2957 cells/mm² at birth.
  • Annual cell loss was calculated at 7.58 cells/mm².
  • Corneal endothelial cell density decline occurs rapidly until age 35, then decelerates, with increasing polymegatism and decreasing hexagonal cells.

Impact:

  • Corneal endothelial structure changes differ between the first three decades and later life.
  • Potential causes include mechanical, physical, and biochemical factors, or embryological origins.
  • Age may not be a decisive factor for intraocular surgeries, challenging previous assumptions.