Vision At The Blind And Visually Impaired

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Vision is defined as “the sense by which objects in the external environment are perceived by means of the light they give off or reflect” (Saunders, 2007). Vision is very a significant aspect in human life. If an individual is visually impaired, it will cause other developmental delays in that individual including the sensory, motor, cognitive, social and language developments (Texas School for the Blind and Visually Impaired, n.d.). It is already well known that infants are not born with perfect vision. They only achieve vision close to adult maturity by about six months after birth. There are a lot of aspects of vision in infants that undergoes development such as contrast sensitivity function, acuity perception, motion perception,…show more content…
Additionally, by knowing how colour vision differs in infants and adults, if we find out that an infant does not have colour vision that works the same way as adults, then even if the test has been adapted for infants, it still cannot be used. FPL chromatic discrimination paradigm is used for examining colour vision in infants. From experiments conducted using FPL chromatic discrimination paradigm, it is proven that colour vision of infants improve significantly between 1 and 3 months of age (Brown, 1990). In a review paper by Brown (1990), it is stated that infants at 3 to 4 weeks of age generally have poor ability to discriminate colours. However, when long-wavelength lights are used, the result is vague. Most experiments result in infants at 1 month of age failing to distinguish the stimulus when it comes to using long-wavelength light. Having said that, there are a few reported infants that could discriminate successfully. As for infants over 2 months old, it is clear that half of them could make some chromatic discriminations. At 3 months of age, based on the several studies mentioned by Brown (1990), most of the infants can already make chromatic discriminations. Hence, it is concluded that they have colour vision to a certain degree as they might not necessarily be trichromats nor have the colour vision of an adult. Relation between colour vision and spatial vision During the first 3 months of life, colour vision and test
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