To determine the prevalence rates and causes of low vision, blindness, and patient-assessed deficient visual function among Singaporean Chinese adults.
In addition, the shine-through paradigm offers insights into the mechanisms of deficient visual information processing of schizophrenic patients.
This is of concern as most studies reporting deficient visual attention have focused on deaf non-signers.
Alternatively, if auditory deprivation results in deficient visual selective attention, deaf individuals' performance on the UFOV task should be impaired relative to that of hearing individuals.
Based on these findings, it has been argued that auditory deprivation results in deficient visual selective attention, with deaf individuals being unable to differentiate task-relevant from task-irrelevant information [16].
Experiments in the laboratory are necessarily very short when compared to the extended exposure to deficient visual near work which may occur during professional computer work.
Complete congenital achromatopsia is a devastating hereditary visual disorder, which is associated with a deficient cone-mediated electroretinogram (ERG) response, color blindness, visual acuity loss, pendular nystagmus, extreme light sensitivity and daytime blindness (1– 3).
The biochemical relationship between vitamin A and scotopic vision was first described in 1925 when Holm observed that regeneration of visual purple (rhodopsin) was slowed in vitamin A deficient rats [ 1].
Experimental studies confirmed that a deficient dietary intake of DHA can lead to a reduced neuronal cell size, a decreased visual function and a compromised learning behavior [ 13, 14].
A deficient habituation of evoked potentials during the pain-free interval of migraine patients has been shown for nonpainful visual [3], auditory [4], somatosensory [5] and nociceptive stimuli [6] as well as for brainstem reflexes [7].
A deficient imagination is a great help as well.
