The Refractive State of the Eye of the Kangaroos Macropus giganteus and M. rufus

Abstract

Refractive findings were determined with a retinoscope for two species of kangaroos. The 10 eyes studied were found to be hyperopic between 1.5 and 2.0 dioptres, with and without cycloplegia. Due to the large size of the eye, the hyperopia cannot be explained on the basis of retinoscopic reflection from the vitreous-retina border. The hyperopia may be due to an as yet unexplained artefact or it may reflect indifference to optical quality.