vision/eye
• Although homozygotes have a normal retina at 3 months of age they begin to display retinal degeneration by 5 months of age and have 30-40% photoreceptor loss at 10 months of age
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• homozygotes have normal rod ERG responses at 3 months of age, but diminished at 5 and 10 months of age; the cone ERG responses are not much changed in this time frame
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nervous system