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determine the fransworth 100 hue panel testthis is a simple and useful test using colour chips arranged in a particular sequence colour deficient
describe in brief about pseudoisoehromatic plates testcommonly known as ishiharas plates these reveal one pattern to the normal eye and another to
explain about the incidence of defects in color visiondefects in colour vision can either be congenital or acquired males are more affected than
enumerate about the colour vision defectsacquired colour vision defects can occur afkr damage to the optic nerve or macula and in some cases because
determine about the trichromatic visiontrichromatic vision is the terminology used for normal vision those who require au three primary colours to
what is defective colour visiondefective colour vision is often called colour blindness the ability to appreciate one or more of the primary colours
give the details of colour visionthe genes for colour sense are located on the x chromosome recessive inheritance and on chromosomes 3 and 7 changes
youngs trichromatic theory according to youngs theory three types of cones exist each sensitive to a particular pigment-rythrolabe red chlorolabe
what are the three qualities specific to colour visionthere are three qualities specific to colour vision- hue saturation and brightnesshue hue is
explain about the color vision of human eyethe human eye can see about 150 different colours in the visible spectrum 400- 750 nm red green and blue
state the transmission of visual sensationthis process takes place in the visual pathway from the retina to the visual cortex the impulse originating
describe the initiation of visual impulse when light falls on the retina it is absorbed by the photosensitive pigments of rods rhodopsin and cones
determine about the sense of contrastit is the ability to perceive slight changes in luminance between regions which
explain about the colour sensecolour sense is the faculty whereby we are enabled to distinguish colours as excited by light
what is form senseform sense is the faculty which enables us to perceive the shape of objects in the outer world here
state about visual systemit is important for our visual system to adapt to recognize objects clearly in differing conditions of
name the blood vessel which bring waste product to
explain the radiation cataract and steroid induced cataract of the eyeradiation cataractexposure to radiation causes discoid posterior sub-capsular
illustrate the diabetic contract of the eyediabetic cataract1 sorbitol aldose pathway in patients with diabetes there is increase in sugar alcohol
what are the risk factors of cataractogenesisrisk factors of cataractogenesisa hereditaryb exposure to ultra violet radiation the ultra violet
how are the change in the ageing lens occurred in the metabolismchanges in the ageing lens 1 physical changes lens weight increases light
define the lens transparency in metabolism of lenslens transparencya transparency depends on avoidance of large transitions of refractory index this
how is synthesis of soluble proteins taking equatorial part on the surface of lenssynthesis of soluble proteins taking equatorial part on the surface
what are the types of proteins in metabolism of lenssoluble proteinsits synthesis takes place in the equatorial part on the surface of lensa alpha