Advances in Understanding Mechanisms and Treatment of by R. John Leigh, Michael W. Devereaux

By R. John Leigh, Michael W. Devereaux

This quantity brings jointly paintings from best researchers within the fields of developmental issues of binocular imaginative and prescient, strabismus, and either childish and purchased varieties of nystagmus. It comprises 4 sections. the 1st part, simple options of strong imaginative and prescient and Gaze, offers with psychophysical elements of childish different types of nystagmus and the relative contributions of extraocular proprioception and efference (corollary discharge). It additionally comprises an obtainable overview of present notions of spatial and temporal visible capabilities and spatial fidelity in childish nystagmus syndrome and latent nystagmus. the second one part, New versions and methods for learning Gaze balance, experiences animal and improvement types for strabismus, amblyopia, and nystagmus. It additionally comprises novel optical tools for dealing with the visible effects of nystagmus and a research of the aptitude ailing results of video monitors on kid's reaction to close viewing. The 3rd part, New cures for Congenital Nystagmus, offers easy genetic experiences and scientific trials of drug and surgical operation of these sufferers with childish kinds of nystagmus. the ultimate section,General elements of ordinary and irregular Gaze keep watch over, pulls jointly a variety of contributions facing common gaze keep watch over, childish nystagmus, and bought issues of eye pursuits, together with new remedy measures. This ebook should be a precious source for all scientists and practitioners attracted to developmental issues of imaginative and prescient.

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Ocular proprioception and efference copy in registering visual direction. Vision Res. 1991;31:1903–1913. Leigh RJ, Dell’Osso LF, Yaniglos SS, Thurston SE. Oscillopsia, retinal image stabilization and congenital nystagmus. Invest Ophthalmol Visual Sci. 1988;29:279–282. Goldstein HP, Gottlob I, Fendick MG. Visual remapping in infantile nystagmus. Vision Res. 1992;32:1115–1124. Bedell HE, Currie DC. Extraretinal signals for congenital nystagmus. Invest Ophthalmol Visual Sci. 1993;34:2325–2332. Abadi RV, Whittle JP, Worfolk R.

To convert the temporal contrast sensitivity data to TIRfs, we assumed that the visual system can be described at threshold by a linear second-order, low-pass temporal filter (Eq. 2): R(t) = (A × W/ Sqrt[1–D2]) × exp(−D × W × t) × sin(W × Sqrt[(1–D2) × t]) In this equation, R is the response of the visual system in time (t) to a brief pulse, A is the response amplitude, W is the temporal frequency of the response in radians/s, and D is the damping ratio (0 ≤ D < 1). Based on this assumption, we iteratively determined the TIRf that, after Fourier analysis, yielded the best fit to the temporal contrast sensitivity data for grating motion to the left and right during fixation, and for grating motion in the “opposite” and “same” direction as rightward pursuit.

Leigh RJ, Dell’Osso LF, Yaniglos SS, Thurston SE. Oscillopsia, retinal image stabilization and congenital nystagmus. Invest Ophthalmol Visual Sci. 1988;29:279–282. Goldstein HP, Gottlob I, Fendick MG. Visual remapping in infantile nystagmus. Vision Res. 1992;32:1115–1124. Bedell HE, Currie DC. Extraretinal signals for congenital nystagmus. Invest Ophthalmol Visual Sci. 1993;34:2325–2332. Abadi RV, Whittle JP, Worfolk R. Oscillopsia and tolerance to retinal image motion in congenital nystagmus. Invest Ophthalmol Visual Sci.

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