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Myopia in animals

AI overview

Some animals suffer from shortsightedness and have poor eyesight, and in domestic animals myopia, with or without astigmatism, occurs frequently.

Key points
  • Myopia, with or without astigmatism, is the most common eye condition in horses.
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    Myopia, with or without astigmatism, is the most common eye condition in horses.
  • Occlusion myopia has been recorded in tree shrews, macaques, cats and rats based on animal-inducing myopia models.
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    Several types of occlusion myopia have been recorded in tree shrews , macaques , cats and rats , deciphered from several animal-inducing myopia models.
  • Retinoscopy of 240 dogs found myopic problems with varying degrees of refraction errors depending on the breed.
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    found myopic problems with varying degrees of refraction errors depending on the breed.
  • German Shepherds, Rottweilers and Miniature horses showed refraction errors indicative of myopia.
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    In cases involving German Shepherds , Rottweilers and Miniature horses , the refraction errors were indicative of myopia.
  • Nuclear sclerosis of the crystalline lens was noticed in older dogs.
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    Nuclear sclerosis of the crystalline lens was noticed in older dogs.
  • Surgically fusing the eyelid of newborn macaque monkeys for one year results in eye deterioration.
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    surgically fusing the eyelid for one year results in eye deterioration as the eye has not had a chance to grow and develop.
  • Keeping monkeys in the dark for a similar period does not lead to myopia.
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    Keeping monkeys in the dark for a similar period, however, does not lead to myopia.
  • Raising body temperatures and intraocular pressures in rabbits caused younger rabbits to develop myopia, but not older rabbits.
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    while younger rabbits were prone to developing myopia, older rabbits were not.
  • The rhinoceros compensates for less-than-adequate eyesight by relying on superior hearing and sense of smell.
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    it generally survives by concentrating with its superior hearing and sense of smell.
Symptoms
  • Affected animals exhibit shortsightedness and poor eyesight.
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    Some animals suffer from shortsightedness and have poor eyesight.
Diagnosis
  • Retinoscopy has been used in preliminary laboratory investigations to assess refraction errors in dogs.
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    Preliminary laboratory investigations using retinoscopy of 240 dogs
AI-synthesized from the Wikipedia article “Myopia in animals”. Not medical advice. Verify source →
A rhinoceros, known for its poor eyesight

Some animals suffer from shortsightedness and have poor eyesight. In domestic animals, myopia, with or without astigmatism, occurs frequently.[citation needed]


Whereas the rhinoceros may suffer from less-than-adequate eyesight, it generally survives by concentrating with its superior hearing and sense of smell.[1]

Myopia, with or without astigmatism, is the most common eye condition in horses.[citation needed] Several types of occlusion myopia have been recorded in tree shrews, macaques, cats and rats, deciphered from several animal-inducing myopia models. Preliminary laboratory investigations using retinoscopy of 240 dogs[2] found myopic problems with varying degrees of refraction errors depending on the breed. In cases involving German Shepherds, Rottweilers and Miniature horses, the refraction errors were indicative of myopia. Nuclear sclerosis of the crystalline lens was noticed in older dogs.[2]

Experiments into newborn macaque monkeys have revealed that surgically fusing the eyelid for one year results in eye deterioration as the eye has not had a chance to grow and develop.[3] Keeping monkeys in the dark for a similar period, however, does not lead to myopia.[3] In 1996, Maurice and Mushin conducted tests on rabbits by raising their body temperatures and intraocular pressures (IOP) and noted that while younger rabbits were prone to developing myopia, older rabbits were not.[4]

  1. ↑ Kingdon, Jonathan (1988). East African Mammals: An Atlas of Evolution in Africa, Volume 3, Part B: Large Mammals. University of Chicago Press. pp. 96–97. ISBN 9780226437224.
  2. 1 2 "Myopia and Refractive errors in Dogs" (PDF). Investigative Ophthalmology & Visual Science. 33 (8). Association for Research in Vision and Investigative Optholomology. July 1992. Retrieved 2 November 2012.
  3. 1 2 Raviola, E.; Wiesel, T. N. (1985). "An Animal Model of Myopia". New England Journal of Medicine. 312 (25): 1609–1615. doi:10.1056/NEJM198506203122505. PMID 4000200.
  4. ↑ Rosenfield, Mark; Gilmartin, Bernard (1998). Myopia and Nearwork. Elsevier Health Sciences. p. 4. ISBN 978-0-7506-3784-8. Retrieved 31 October 2012.