The development of the refractive state in the newborn Thomson gazelle

R. Ofri*, S. Millodot, Y. Tadmor, E. Matalon, P. H. Kass, I. H. Horowitz, M. Millodot

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Changes in refractive error during the first 3 months of life were studied retinoscopically in six Thomson gazelles (Gazella thomsoni). Animals were hand-raised to allow repeat testing over time without chemical restraint. Refraction results were correlated with ultrasound measurements of intraocular dimensions, and with values in adult gazelles. Gazelles are born hyperopic with a mean refractive error of 3.44 ± 0.31 D. By day 50, the animals are virtually emmetropic (0.13 ± 0.21 D) and remain so in adulthood (0.03 ± 0.09 D). The refractive error is highly correlated with the axial length (r2 = 0.96) and with the vitreous chamber depth (r2 = 0.83), but not with anterior chamber depth. Significant with-the-rule astigmatism was recorded (P < 0.001).

Original languageAmerican English
Pages (from-to)831-835
Number of pages5
JournalJournal of Comparative Physiology A: Neuroethology, Sensory, Neural, and Behavioral Physiology
Volume190
Issue number10
DOIs
StatePublished - Oct 2004

Bibliographical note

Funding Information:
Acknowledgements This study was supported by the Sheinbron Foundation, Hebrew University of Jerusalem. The experiments comply with both the Principles of animal care, publication no. 86-23, revised 1985, from the National Institutes of Health and with current Israeli law.

Keywords

  • Axial length
  • Emmetropia
  • Hyperopia
  • Thomson gazelle
  • Wildlife

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