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New Methods of Sensory Visual Testing (Paperback, Softcover reprint of the original 1st ed. 1989)
Loot Price: R1,464
Discovery Miles 14 640
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New Methods of Sensory Visual Testing (Paperback, Softcover reprint of the original 1st ed. 1989)
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Measurement of visual acuity has been the cornerstone of visual
testing since Snellen began quantitating visual acuity using letter
optotypes in the 1860s. Bjerrum in the 1880s brought sophistication
and quantitation to the assessment of the visual field with tangent
screen examination using differently sized and colored targets.
Further advances in visual testing did not occur until the Goldmann
perimeter and the Farnsworth Munsell 100 Hue test were introduced
in the 1940s, permitting further refinement in the detection and
quantitation of acquired visual loss. An explosion of interest in
sensory visual function testing followed the demonstration by
Quigley and his colleagues in 1982 that despite the loss of more
than 40% of the axons in the optic nerve, Snellen acuity and
kinetic perimetry remained normal. Much of this interest has
focused on a search for more sensitive and disease-specific sensory
visual tests. Previously, novel tests used to probe visual function
remained in the province of the visual physiologist and
psychophysicist. These tests are now being introduced by the
ophthalmologist into clinical practice. Concomitantly, the mass
production of microcomputers and other technical advances have made
tests such as automated perimetry and visual evoked response
testing affordable for most offices. The clinician is presently
being inundated with a plethora of visual function tests that may
require a knowledge of visual psychophysics and statistics to
understand and interpret. The purpose of this book is to acquaint
the clinician with these new tests so that they may be used to
maximum benefit.
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