Visually-Impaired Touch

Heller, Morton A.; Ballesteros, Soledad

doi:10.2991/978-94-6239-133-8_32

Cited by 3 publications

(2 citation statements)

References 44 publications

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“…As for the two-point discrimination value, smaller value means a higher sensitivity, Pearson correlation coefficient in negative actually shows a positive correlation between them and this result is enough to suffice that out of many factors, time spent with disability is an important factor, and that with more time spent with the disability, the amplification of senses is higher. ( 13) (29) Conclusion: -This results are enough to suffice that in visually impaired individuals, a, statistically significant difference in amplification in their sensitivity for touch and sensory acuity is present which is higher than the sensitivity any normal individual possesses and that their two-point discrimination is better. The results are clinically significant and a visible difference is present.…”

Section: Results: -mentioning

confidence: 86%

Section: Resultsmentioning

confidence: 99%

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Analyzing the amplification of touch sense in visually impaired individuals and comparison with normal individuals

Desai

2023

Preprint

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Background It has been said for ages that if a person loses one of the basic senses like sight or hearing, other senses are amplified to make up for it. This has been substantially proved without a doubt that amplification helps the specially-abled individual in their day-to-day life to an extent. These increases are present but have not been quantified and measured on how much the increases are present. Aim 1)To estimate and compare sensitivity of touch between visually impaired and normal people and analyze the amplification if present. Methodology: - A Cross-Sectional Case-control Study was carried out. Individuals with 6/6 vision and normal in other senses were first examined with the Static Two-point discrimination test to have a baseline value and then different categories of visually impaired individuals were subjected to this test. The test was carried out on the forehead and fingertips of all subjects. Their results were compared using different statistical tools. Results: - Total 45 visually impaired individuals with various severity of blindness with 20 Normal individuals taken for the study. Two-point discrimination values for normal individuals (Fingertip=3.43+/-1.519,Forehead=13.531+/-2.364), whereas for all and any type of visually impaired individual (fingertip=2.83+/-0.27,Forehead=13.08+/-0.26)is statistically(Fingertip, p=0.0101)(Forehead, p=0.4461).R-value for time spent since the disability and degree of amplification is -0.356. Conclusion: - A significant difference is present between the values of test between visually impaired and normal individuals. Appreciable that with various degrees of blindness, the average values of two-point-discrimination value are different. Totally blind shows the highest sensitivity. Key words: - Blind, Touch Sensitivity, Amplification of sense,

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Section: Results: -mentioning

confidence: 86%

Section: Resultsmentioning

confidence: 99%

Analyzing the amplification of touch sense in visually impaired individuals and comparison with normal individuals

Desai

2023

Preprint

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Enhanced Odorant Localization Abilities in Congenitally Blind but not in Late-Blind Individuals

et al. 2020

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Although often considered a non-dominant sense for spatial perception, chemosensory perception can be used to localize the source of an event and potentially help us navigate through our environment. Would blind people who lack the dominant spatial sense -vision- develop enhanced spatial chemosensation or, alternatively, suffer from the lack of visual calibration on spatial chemosensory perception? To investigate this question, we tested odorant localization abilities across nostrils in blind people compared to sighted controls, and if the time of vision loss onset modulates those abilities. We observed that congenitally blind individuals (10 subjects) outperformed sighted (20 subjects) and late-blind subjects (10 subjects) in a birhinal localization task using mixed olfactory-trigeminal stimuli. This advantage in congenitally blind people was selective to olfactory localization but not observed for odorant detection or identification. We therefore showed that congenital blindness but not blindness acquired late in life is linked to enhanced localization of chemosensory stimuli across nostrils, most probably of the trigeminal component. In addition to previous studies highlighting enhanced localization abilities in auditory and tactile modalities, our current results extend such enhanced abilities to chemosensory localization.

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Shape from touch

Kappers¹,

Tiest²

2014

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Visually-Impaired Touch

Cited by 3 publications

References 44 publications

Analyzing the amplification of touch sense in visually impaired individuals and comparison with normal individuals

Analyzing the amplification of touch sense in visually impaired individuals and comparison with normal individuals

Enhanced Odorant Localization Abilities in Congenitally Blind but not in Late-Blind Individuals

Shape from touch

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