[Neuro-ophthalmological problems: the diagnostic value of contrast sensitivity].
The evaluation of the individual contrast sensitivity function may prove useful in cases affected by lesions of the optic pathways, even when the usual neuro-ophthalmological tests (i.e. visual acuity, visual field examination) are normal. The contrast sensitivity function represents an alternative method to assess the power of spatial resolution of the visual system: in particular, it enables to measure the sensitivity at high, medium and low ranges of spatial frequencies, this being unique to such a procedure. The possible physiological mechanisms underlying the contrast sensitivity function as well as its pathological changes are reviewed.
D005556:Form Perception; D006801:Humans; D009901:Optic Nerve Diseases / Q000175:diagnosis; D013028:Space Perception; D014786:Vision Disorders / Q000175:diagnosis*; D014792:Visual Acuity; D014794:Visual Fields; D014796:Visual Perception
Problemi di neuro-oftalmologia: il valore diagnostico della sensibilità al contrasto.