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The effects of reduced ambient lighting on lens compensation in infant rhesus monkeys.
She, Zhihui; Hung, Li-Fang; Arumugam, Baskar; Beach, Krista M; Smith Iii, Earl L.
Afiliación
  • She Z; College of Optometry, University of Houston, Houston, TX, USA.
  • Hung LF; College of Optometry, University of Houston, Houston, TX, USA; Brien Holden Vision Institute, Sydney, NSW, Australia.
  • Arumugam B; College of Optometry, University of Houston, Houston, TX, USA; Former Employee of University of Houston, Houston, TX, USA.
  • Beach KM; College of Optometry, University of Houston, Houston, TX, USA.
  • Smith Iii EL; College of Optometry, University of Houston, Houston, TX, USA; Brien Holden Vision Institute, Sydney, NSW, Australia. Electronic address: esmith@uh.edu.
Vision Res ; 187: 14-26, 2021 10.
Article en En | MEDLINE | ID: mdl-34144362
Although reduced ambient lighting (~50 lx) does not increase the degree of form-deprivation myopia (FDM) in chickens or infant monkeys, it does reduce the probability that monkeys will recover from FDM and that the normal age-dependent reduction in hyperopia will occur in monkeys reared with unrestricted vision. These findings suggest that low ambient lighting levels affect the regulatory mechanism responsible for emmetropization. To study this issue, infant rhesus monkeys (age ~ 24 days) were reared under dim light (55 ± 9 lx) with monocular -3D (dim-light lens-induced myopia, DL-LIM, n = 8) or +3D spectacle lenses (dim-light lens-induced hyperopia, DL-LIH, n = 7) until approximately 150 days of age. Refractive errors, ocular parameters and sub-foveal choroidal thickness were measured periodically and compared with normal-light-reared, lens-control monkeys (NL-LIM, n = 16; NL-LIH, n = 7). Dim light rearing significantly attenuated the degree of compensatory anisometropias in both the DL-LIM (-0.63 ± 0.77D vs. -2.11 ± 1.10D in NL-LIM) and DL-LIH treatment groups (-0.18 ± 1.93D vs. +1.71 ± 0.39D in NL-LIH). These effects came about because the treated and fellow control eyes had a lower probability of responding appropriately to the eye's effective refractive state. Vision-induced interocular differences in choroidal thickness were only observed in monkeys that exhibited compensating refractive changes, suggesting that failures in detecting the relative magnitude of optical errors underlay the abnormal refractive responses. Our findings suggest that low ambient lighting levels reduce the efficacy of the vision-dependent mechanisms that regulate refractive development.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Iluminación / Hiperopía Límite: Animals Idioma: En Revista: Vision Res Año: 2021 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Iluminación / Hiperopía Límite: Animals Idioma: En Revista: Vision Res Año: 2021 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Reino Unido