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In vivo Structural Assessments of Ocular Disease in Rodent Models using Optical Coherence Tomography
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Published on: July 24, 2020

Relation between axial length and ocular parameters.

Sang Hoon Park1, Ki Ho Park, Joon Mo Kim

  • 1Department of Ophthalmology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, South Korea.

Ophthalmologica. Journal International D'Ophtalmologie. International Journal of Ophthalmology. Zeitschrift Fur Augenheilkunde
|October 30, 2009
PubMed
Summary
This summary is machine-generated.

Axial length (AL) is linked to refractive error and ocular dimensions. Longer eyes correlate with myopia and thinner retinal nerve fiber layers (RNFL), while shorter eyes show hyperopia and thicker RNFL.

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Area of Science:

  • Ophthalmology
  • Biometry
  • Optometry

Background:

  • Axial length (AL) is a critical determinant of ocular health and refractive error.
  • Understanding the relationship between AL and other ocular parameters is essential for diagnosing and managing various eye conditions.

Purpose of the Study:

  • To investigate the correlation between axial length (AL) and key ocular biometric parameters.
  • To elucidate how changes in AL influence refractive error, corneal curvature, anterior chamber depth, white-to-white distance, and retinal nerve fiber layer thickness.

Main Methods:

  • Ocular biometric parameters including AL, refractive error (RE), central corneal thickness, anterior chamber depth (ACD), corneal curvature (CC), white-to-white distance (WWD), and retinal nerve fiber layer (RNFL) thickness were measured.
  • Optical biometry, pachymetry, optical coherence tomography, and automatic refractometry were employed for data acquisition.
  • Statistical analysis utilized the Pearson correlation coefficient (r) to assess relationships between AL and other parameters.

Main Results:

  • Elongation of AL was significantly associated with increased refractive error (myopia) (r = -0.790, p < 0.001).
  • Increased AL correlated with decreased corneal curvature (flatter cornea) (r = -0.444, p < 0.001) and thinner RNFL thickness (r = -0.306, p < 0.001).
  • Conversely, AL showed a positive correlation with anterior chamber depth (ACD) (r = 0.506, p < 0.001) and white-to-white distance (WWD) (r = 0.279, p < 0.001).

Conclusions:

  • Shorter eyes tend to exhibit hyperopia, steeper corneas, and thicker RNFL.
  • Longer eyes are associated with myopia, flatter corneas, and thinner RNFL.
  • These findings highlight the intricate interplay between axial length and multiple ocular parameters, impacting refractive development and potentially influencing susceptibility to certain ocular conditions.