OPTA 204 vision and visual processing skills
Vision is a Prerequisite to?
perseption, cognition, motor planning
What is our visual sequence?
receive-> process-> interpret-> respond
Visual Acuity
The ability to distinguish details of shape and object fffrom a given distance
Accomondation
The ability to adjustthe focus of the eyes between the individual and objects
Convergence
Occurs when the eyes simultaneously turn towards each other to see a image clearly
Saccade
Rapid eye movement that shifts your gaze from one visual feild to another
Pusuit
The ability to move your eye smoothly following a moving target
Functional Scanning
The ability to efficiently look for information relevent to your enviroment
Deficit in Seeing Colour
Inability to detect certain colours(Red and Green are the common ones)
Stereopsis
The ability to perceive the world in 3 dimentions
Central Blindness
Sudden or Gradual loss of vision in the central feild of the eyes
Strabismus
Type of eye movement that prevent the eyes to align with each other(aka lazy eye)
Nystagamus
Type of eye movement dysfunction that can occcur after a brain injury
Oculomotor Disorder
Problems voluntary moving the eyes
Eye movement Disorder
Eyes moving involuntarily
Perceptual Dysfunction
Eyes perceive something wrong
Binocular Dysfunction
Issues getting the eyes to work together functionally
Process Theory Stage of Input/Reception
Good eye health, Ocularmotor System Intact, Colour Processing intact
Process Theory Stage of Perception/Intergration
Including visual information: Sensory input, Perception (organization of space and motion, from perception, object recognition and visual awareness)**, Proprioception
Process Theory Stage of Motor/Behavior
Getting visual input and then integrating/processing it is what guides behaviour. This is especially true for: Mobility, Hand-eye coordination
Right Homonymous Hemianopia
Loss of vision on the right side of BOTH eyes. Caused due to lesion in the left pareital or temporal lobes with pressure on the left optic track
With no pupillary changes maybe due to complete involvement of the left optic radiation
Left Homonymous Hemianopia
Loss of vision on the left side of BOTH eyes. Caused due to lesion in the Right pareital or temporal lobes with pressure on the Right optic track
Quadrantanopia
Missing A quadrant instead of half
Circunferential Blindness
(tubular vision) May be due to hysteria, optic or retrobulbar neuritis
Right Homonymous Inferior Quadrantanopia
Due to partial involment of optic radiation (upper portion of the left optic radiation in thic case)