Cookies on this website

We use cookies to ensure that we give you the best experience on our website. If you click 'Accept all cookies' we'll assume that you are happy to receive all cookies and you won't see this message again. If you click 'Reject all non-essential cookies' only necessary cookies providing core functionality such as security, network management, and accessibility will be enabled. Click 'Find out more' for information on how to change your cookie settings.

PURPOSE: The brain areas that are responsible for cognitive functioning have the same embryonic origin as the retina. The association between cognitive functioning and retinal nerve fiber layer (RNFL) thickness was assessed in a large, population-based sample. METHODS: Neuropsychological and ophthalmic examinations were performed in 1485 healthy individuals (mean age, 46 years; range, 18-85) from the Erasmus Rucphen Family (ERF) study, a study in a genetic isolate from the Netherlands. Different domains of cognitive functioning were assessed with the Dutch Adult Reading Test, the Rey Auditory Verbal Memory Test, semantic fluency, the Trail-Making Test, the Stroop Color-Word Test, and Block Design. RNFL thickness was measured with scanning laser polarimetry. The association between cognitive test scores and peripapillary RNFL thickness was studied with linear regression analyses, adjusting for age, sex, level of inbreeding, and refractive error. RESULTS: After adjustment for confounders, a better cognitive performance was significantly associated with a thicker RNFL in all tests (P < 0.03) except for the Stroop Color-Word Test (P = 0.15). RNFL thickness explained up to 2.8% (R(2) = 0.028) of the total variance in cognitive test scores. The association diminished in age groups beyond 40 years. CONCLUSIONS: The present study shows that cognitive functioning is associated with RNFL thickness in healthy young individuals. The lack of association in older individuals suggests that loss of neurons in the cerebrum and retina is not concomitant and may have different origins.

Original publication

DOI

10.1167/iovs.08-3181

Type

Journal article

Journal

Investigative ophthalmology & visual science

Publication Date

10/2009

Volume

50

Pages

4576 - 4580

Addresses

Glaucoma Service, The Rotterdam Eye Hospital, Rotterdam, The Netherlands. l.vankoolwijk@oogziekenhuis.nl

Keywords

Axons, Retinal Ganglion Cells, Optic Disk, Humans, Pedigree, Cognition, Neuropsychological Tests, Visual Acuity, Adolescent, Adult, Aged, Aged, 80 and over, Middle Aged, Educational Status, Female, Male, Young Adult