CRT-dependent artifacts in contrast-sensitivity measurements
نویسندگان
چکیده
منابع مشابه
Quick contrast sensitivity measurements in the periphery.
Measuring the contrast sensitivity function (CSF) in the periphery of the eye is complicated. The lengthy measurement time precludes all but the most determined subjects. The aim of this study was to implement and evaluate a faster routine based on the quick CSF method (qCSF) but adapted to work in the periphery. Additionally, normative data is presented on neurally limited peripheral CSFs. A p...
متن کاملContrast Sensitivity Measurements, Interpretation and Modifications
Goals Review types of contrast sensitivity tests and their measurements Discuss how contrast sensitivity tests should be interpreted Discuss environmental and patient centered modifications Vision Ability to see details, objects and their environment Typically measured with high contrast charts Snellen most common test in primary care Test is typically given at 20 foot distance ...
متن کاملPredicting individual contrast sensitivity functions from acuity and letter contrast sensitivity measurements
Contrast sensitivity (CS) is widely used as a measure of visual function in both basic research and clinical evaluation. There is conflicting evidence on the extent to which measuring the full contrast sensitivity function (CSF) offers more functionally relevant information than a single measurement from an optotype CS test, such as the Pelli-Robson chart. Here we examine the relationship betwe...
متن کاملContrast sensitivity measurements in acute and resolved optic neuritis.
We measured contrast sensitivity by means of Arden grating plates in 41 eyes with acute optic neuritis and in 51 eyes with resolved optic neuritis. The scores were abnormal in 93% of eyes in the acute phase and 78% in the resolved phase irrespective of visual acuity. Even when acuity improved to 6/7.5 or better with resolution of the neuritis, 67% of eyes still showed abnormal contrast sensitiv...
متن کاملMeasurements of the spectral modulation sensitivity function for two normal observers with CRT monitors
We have measured the sensitivity of the human visual system to chromatic stimuli of single chromatic frequency, ranging from 0.2 to 8.2 cycles/400 nm, and for eight initial phases from 0◦ to 315◦. The optimal phase curves obtained for two observers show a CSF-type shape, with minima at certain frequencies which did not appear in previous computational predictions. The implications of a value of...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Behavior Research Methods, Instruments, & Computers
سال: 1986
ISSN: 0743-3808,1532-5970
DOI: 10.3758/bf03200987