Readme: Descriptive data for USN Research Data Archive



Dataset generated by Hilde R. Pedersen, Stuart J. Gilson and Rigmor C. Baraas





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GENERAL INFORMATION

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TITLE FOR THE DATASET



Rod and cone dark adaptation in congenital aniridia and its association

with retinal structure



DA_aniridia:

Measured dark adaptation for 26 participants with congenital aniridia



DA_healthy_controls:

Measured dark adaptation for 37 healthy participants







CONTACT INFORMATION



Dr. Hilde R. Pedersen

University of South-Eastern Norway

Hasbergsvei 36

3616 Kongsberg

Norway

hilde.r.pedersen@usn.no





DATA COLLECTION

2015–2019 in Norway





LANGUAGE

English





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FILE INFORMATION

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The files are comma-separated text files and can be imported into R

statistical software, Excel or other programs capable of handling

CSV files.



Variables in the dataset

ID: Participant ID (string)

Age: Participant's age (years) at the date of test

Time: The onset time of the test light (minutes since the bleaching light

was extinguished)

Threshold: Threshold in log cd/m^2





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METHODOLOGY

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Dark adaptation measurements quantifies the ability of the rod- and cone-

photoreceptor function to recover after exposure to light. Rod- and

cone-mediated dark adaptation was measured with the DARK-adaptometer

(Roland Consult GmbH, Brandenburg, Germany). After a 5-minute exposure to

bright white light (7000 cd/m2), two 2° circular light sources (with 527 and

625 nm wavelength) were alternately tested at 20° eccentricity temporal of

the fovea over a period of 35 minutes. For each light source, a staircase

psychometric procedure tracked the participant’s responses.



More details is described in Pedersen HR, Gilson SJ, Landsend ECS, Utheim ØA,

Utheim TP, Baraas RC.

Rod and cone dark adaptation in congenital aniridia and its association with retinal structure.