Recent Advances in Visual Dysfunction and Ocular Biomarkers in Neurological Disorders.

30 In a study examining the preclinical stage of AD, ophthalmological examinations of 144 healthy individuals—105 with a family history of AD and 39 without, some carrying and some not carrying the high-risk APOE ɛ4 allele—found that the high-risk group had increased visual acuity but showed a trend toward thinning of the inner retina.

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