Author : Kiranmai Vadapalli, Ravi D, D B Vamsi Krishna, V Jyothirmai, Bhargava Venkata Devarakonda
Abstract : Background: Blindness is a highly limiting disability affecting tens of millions of individuals worldwide.
One of the current challenges in sight restoration and sensory aids for blind pertains to the possible visual
acuity and capacity which can be transmitted through various restoration approaches. Compensation for
sensory handicap by blind individual has been a subject of study and debate. Objects can be recognized by
using any of our sensory modalities. But, the inputs about physical characteristics of a particular object
perceived by vision and touch are unique and complex. Hence, in a blind individual, development of
exceptional compensatory abilities in remaining senses in distinction to becoming severely handicapped
due to the lack of the calibrating visual modality may look like a distant theoretical possibility.
Aims: To compare tactile sensation among blind and sighted individuals.
Materials and Methods: 85 subjects in between age group of 18-27 years. Study Group-Consisted of total
21adventitiously(not congenitally blind) blind subjects. Control Group-Consisted of total 64 apparently
healthy sighted subjects.
Statistical Analysis used: Results had been analysed using unpaired test by SPSS version 16.
Results: It was observed that mean values for two point discrimination on horizontal and longitudinal
axes, mean values of the time taken for letter identification was significantly lower in the blind group than
the sighted group.
Conclusions: Results of the present study showed that the non sighted group outperformed the
performance of the sighted group.
Keywords: Blindness, Tactile sensation, Sighted individuals.