Then, the speed difference and the same sensitivity function
Objectives: To assess and compare contrast sensitivity function
in the previously amblyopic and non-amblyopic "normal" eyes of patients with microtropia and anisometropia who achieved 20/20 visual acuity after occlusion therapy.
It is through this contrast sensitivity function
that the visual system obtains the information from the input image of the stimulus in the frequency domain.
The overall design of the controller is concerned with shaping the loop gain, C(s)P(s), for the controller, C(s), and the plant, P(s) to make the sensitivity function
, S(s), control sensitivity function
, R(s), and complementary sensitivity function
, T(s), as small as possible for the system.
The prediction was improved when the residuals were weighted to take account of the greater sensitivity to mid-range spatial frequencies, as in a published estimate of the contrast sensitivity function
The lowest sinusoidal spatial frequency works best due to the contrast sensitivity characteristics per the Contrast Sensitivity Function
(CSF) of the human eye; however the tradeoff is the amount of intrusion into the active area of the display.
Thus, the contrast sensitivity function
(CSF) represents the CS for a set of spatial frequency bands low, medium and high (De Valois & De Valois, 1988).
Mesopic radial frequency contrast sensitivity function
for young and older adults.
Thus, the Barten SQRI is calculated based on measurable properties of the visual displays and the contrast sensitivity function
(CSF) of the person.
Contrast sensitivity function
(CSF) is one of the most important measures of visual system performance  which is determined according to a person's ability to discriminate luminance , (luminance or achromatic contrast sensitivity) or color differences  (chromatic contrast sensitivity), resulting from the interaction of black-white, blue-yellow, and red-green opponent channels.
They provide a spectral sensitivity function
for lipofuscin that also peaks at blue wavelengths, but extends to longer wavelengths than the older blue hazard spectral sensitivity function
International Commission on Illumination (CIE) in 1931 has introduced human eye sensitivity function
V([lambda]), which was modified in 1978 (Fig.