June 1978
Volume 17, Issue 6
Articles  |   June 1978
Differential effect of the rd mutation on rods and cones in the mouse retina.
Investigative Ophthalmology & Visual Science June 1978, Vol.17, 489-498. doi:
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      L D Carter-Dawson, M M LaVail, R L Sidman; Differential effect of the rd mutation on rods and cones in the mouse retina.. Invest. Ophthalmol. Vis. Sci. 1978;17(6):489-498.

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

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The retinas of rd/rd C57BL/6J-rd le mice have been examined by light and electron microscopy to determine whether rod cell degeneration precedes cone cell degeneration. In all regions of the eye, a rapid rod degeneration precedes a much slower cone degeneration. Only about 2% of the rods remain in the posterior region at postnatal day 17, and none by the day 36. By contrast, at least 75% of the cone nuclei remain at day 17. Although most of these slowly disappear, about 1.5% of the original population of cone nuclei in the posterior retina is still present at 18 months of age. A central to peripheral temporal gradient of degeneration exists, such that some rod nuclei persist in the far periphery up to day 47, but none is found at day 65. About 5% of the cone nuclei are still present in the far periphery at 18 months of age.


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