June 2017
Volume 17, Issue 7
Open Access
OSA Fall Vision Meeting Abstract  |   June 2017
Psychophysical measurement of marmoset acuity and myopia
Journal of Vision June 2017, Vol.17, 11. doi:10.1167/17.7.11
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      Shanna Coop, Samuel U. Nummela, Shaun Cloherty, Chantal Boisvert, Mathias Leblanc, Jude F. Mitchell; Psychophysical measurement of marmoset acuity and myopia. Journal of Vision 2017;17(7):11. doi: 10.1167/17.7.11.

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      © ARVO (1962-2015); The Authors (2016-present)

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The common marmoset has attracted increasing interest as a model for visual neuroscience. A measurement of fundamental importance to ensure the validity of visual studies is spatial acuity. The marmoset has excellent acuity that has been reported at the fovea to be nearly half that of the human (Ordy and Samorajski, 1968), a value that is consistent with them having similar photoreceptor densities combined with their smaller eye size (Troilo et al, 1993). Of interest, the marmoset exhibits a higher proportion of cones than rods in peripheral vision than human or macaque, which in principle could endow them with better peripheral acuity depending on how those signals are pooled in subsequent processing. Here we introduce a simple behavioral paradigm to measure acuity and then test how acuity in the marmoset scales with eccentricity. We trained subjects to fixate a central point and detect a peripheral Gabor by making a saccade to its location. First, we found that accurate assessment of acuity required correction for myopia in all subjects. This is an important point because marmosets raised in laboratory conditions often have mild to severe myopia (Graham and Judge, 1999), a finding that we confirm, and that would limit their utility for studies of vision if uncorrected. With corrected vision, we found that their acuity scales with eccentricity similar to that of humans and macaques, having roughly half the value of the human and with no clear departure for higher acuity in the periphery.

Meeting abstract presented at the 2016 OSA Fall Vision Meeting

Graham, B., Judge, S. J. 1999. Normal development of refractive state and ocular component dimensions in the marmoset (Callithrix jacchus) Vision research 39(2): 177– 187 [CrossRef] [PubMed]
Ordy, J. M., Samorajski, T. 1968. Visual acuity and ERG-CFF in relation to the morphologic organization of the retina among diurnal and nocturnal primates Vision research 8(9): 1205IN11217-1216IN41225
Troilo, D., Rowland, H. C., Judge, S. J. 1993. Visual optics and retinal cone topography in the common marmoset (Callithrix jacchus) Vision research 33(10): 1301– 1310 [CrossRef] [PubMed]
 This work was supported by NIMH grant R0121MH104756-01 and NIH grant U01-NS094330.

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