The normal pupil size in adults varies from2 to 4 mm in diameter in bright light to 4 to 8 mm in the dark. The pupils are generally equal in size. They constrict to direct illumination (direct response) and to illumination of the opposite eye (consensual response). The pupil dilates in...
We invited 44 older and 44 younger adults to perform the Stroop task while their pupil dilation was recorded with eye-tracking glasses. The dependent variables were the number of accurate responses on the Stroop task as well as pupil size in the three conditions of the task (i...
DB OCTA acquisitions were acquired after pupil dilation as described previously [12]. All eyes underwent DB OCTA examination using manufacturer's software applied to Heidelberg Spectralis OCTA scans: Heidelberg SP-X2001 (Heidelberg Engineering, Heidelberg, Germany), with a central wavelength of 870 nm...
(leading to vascular congestion), the sympathetic ganglia (leading toHorner’s syndrome, presenting with the triad of miosis, ptosis, and anhidrosis - that is, constriction of the pupil, drooping of theeyelid, and loss of the ability to sweat respectively), or even thebrachial plexusinshoulder...
All eyes included in this study underwent SD-OCT scanning of the macular area after pupil dilation. Each scan was performed by the same experienced operator. OCT images were acquired by obtaining perifoveal volumetric retinal scans comprising 37 A-scans with 496 pixels in depth and 768 pixels in...
Disc-centered digital retinal fundus photographs were obtained from all participants using a non-mydriatic retinal camera (TRC 50DX, Topcon Inc., Tokyo, Japan) after pharmacological pupil dilation. A series of retinal photographic vascular metrics (vessel caliber, vascular fractal dimension, vascular tor...
The effect of aceclidine(+) and pilocarpine on the intraocular pressure and the sphincter pupillae in patients suffering from open angle glaucoma, and on the accommodation in normal young subjects, was studied. The results demonstrated a similar effect of both drugs. The discrepancy between the ...
Pupil dilation refers to an increase in pupil diameter between the onset and offset of a stimulus, and is calculated relative to the baseline pupil size (or baseline) measured during the pre-stimulus (quiet or noise-only) period. Listening effort and its relationship with cognitive abilities ...
( 1996 ) Pupil dilation response to the acetylcholine receptor antagonist tropicamide in normal aged and senile dementia subjects . Neurobiol Aging 17 , S165 .Imamura Y, Kojima H, Haraoka K (1996) Pupil dilation response to the acetylcholine receptor antagonist tropicamide in normal aged and ...
Pupil size in relation to mental activity during simple problem-solving. Science. 1964;143(3611):1190-1192. Google Scholar, Crossref, Medline, ISI6. Hoeks, B, Levelt, W. Pupillary dilation as a measure of attention. Behav Res Methods. 1993;25:16-26. Google Scholar, Crossref7. Beatty,...