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Related Experiment Videos

Crystalline lens power in myopia.

L F Garner1, M Yap, R Scott

  • 1Department of Optometry, University of Auckland, New Zealand.

Optometry and Vision Science : Official Publication of the American Academy of Optometry
|November 1, 1992
PubMed
Summary

The crystalline lens compensates for axial eye growth, reducing myopia. A significant decrease in lens power was observed in myopic subjects, suggesting an active role in emmetropization.

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Area of Science:

  • Ophthalmology
  • Optometry
  • Developmental Biology

Background:

  • Eye growth involves coordinated changes in refractive power to prevent myopia.
  • The role of crystalline lens power reduction in emmetropization is debated: active vs. passive growth-related changes.

Purpose of the Study:

  • To investigate the role of crystalline lens power in emmetropization.
  • To compare ocular dimensions and lens power between myopic and emmetropic individuals.

Main Methods:

  • Ocular dimensions and crystalline lens power were measured.
  • 19 myopic and 19 emmetropic subjects were matched for age, gender, and ethnicity.

Main Results:

  • No significant difference in corneal radius of curvature was found between groups.
  • A significant difference (p < 0.05) in crystalline lens power (2.30 D) was observed.
  • The decrease in crystalline lens power provided greater compensation for axial elongation than corneal flattening.

Conclusions:

  • Crystalline lens power reduction plays a significant role in compensating for axial eye elongation.
  • Findings suggest an active role for the crystalline lens in the emmetropization process.

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