binocular single vision ppt
Post on 07-May-2015
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Binocular Single Vision
Dr.Ricky Barot DOMS,(DNB Cont.)Dr.Vinay Prasad MBBS, (DNB Cont.)
BACKGROUND
Anatomical Aspects
Physiological Aspects
ANATOMICAL ASPECTS
Pre natal period
Just before birth
Post natal period
FACTORS AFFECTING
Genetic & Molecular control
Onset of electrical activity
Receptive fields
Chemical mediators & Neuromodulatory transmitters
Genetic & Molecular control
Normal structure development
Peripheral retinal development
Contour integration
ELECTRICAL ACTIVITY
Purpose
LTP & LTD
Cells that fire together wire together
Two distinct pathways
RECEPTIVE FIELDS
Further refinement under influence of visual experience
Group of cells behave in a similar manner
On – center & Off – center cells
Receptive fields in cortex
Chemical mediators & Neuromodulatory Transmitters
Controls circular receptive fields of retinal cells
Influence the visual cortex via modulatory pathways from other sites within cerebral cortex
Critical period, Plastic period & Amblyopia
Correlation with visual function development
Visual Acuity
Contrast Sensitivity
Orientation Specificity & Motion Selectivity
Stereopsis : pre & post – stereoptic phase
PHYSIOLOGICAL ASPECTS Visual Directions & Horoscope
Binocular Fusion
Dichoptic Stimulation
Stereopsis
Depth perception
Integration of Motor & sensory systems
Visual Directions & Horoscope
Visual space vs. Physical space
Visual Directions
Corresponding points & NRC
Horopter
Physiological Diplopia
Binocular Fusion
Sensory Fusion
Panum’s Area
Fixation Disparity
Theories
Dichoptic Stimulation
Depth with Fusion
Depth with Diplopia
Diplopia without Depth
Binocular Rivalry & Suppression
Stereopsis
Physiological basis
Stereopsis & Fusion
Stereoscopic Acuity
Neurophysiologic Basis
Depth perception
Stereopsis
Non stereoscopic binocular clues
Monocular clues
Influence of Accommodation & Convergence
Integration of Motor & sensory systems
Functions of motor system
Function of sensory system
GRADES OF BSV
Simultaneous Macular Perception
Fusion
Stereopsis
THANK YOU
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