The ability to maintain visual focus on an object with both eyes, creating a single visual image is known as binocular vision. The position of each eye in its orbit is controlled by six extraocular muscles. Slight differences in the length or insertion position or strength of the same muscles in the two eyes can lead to a tendency for one eye to drift to a different position in its orbit from the other, especially when one is tired.
Binocularity is important for people in their everyday life because it gives us the ability to fuse together the images that we see correctly.
For example, depth perception or stereopsis is one of the main benefits that occurs when you have strong binocular vision. This is an essential skill to aquire in order to be able to move comfortably through the space around you. Binocular vision is extremely important whether it be reading a book, riding a bike, or even catching a thrown ball.
Many people benefit greatly from binocularity training. One current example of this is Susan Barry, professor of neurobiology in the department of biological studies at Mount Holyoke College. Find out more about how she overcame many obstacles to develop the skills she needed to succeed and enjoy life to its fullest.
The following are instruments that we use in our therapy sessions:
Rotating Pegboard Machine (RPM): The pegboard rotates in clockwise and counter-clockwise modes (up to 99 rotations per minute), and can be used in the testing and training for: eye tracking, eye hand coordination, bilateral integration, binocular vision development and figure ground perception.
VMC Stick and Pendulum Ball: Using the VMC Stick helps to develop the ability to structure space, visualize motion in space, and track objects.
Toss Back: Maximum brain performance depends on precise inputs through the vestibular, tactile, motor, auditory, and visual systems.
Pereptual Therapy Systems (PTS): The six therapy procedures address either simultaneous processing, sequential processing and/or speed of information processing.
The Temporal Visual Processing Program (TVPP): The program is designed to improve: " Magnocellular Processing; " Temporal Visual Processing; " Visual Attention; " Naming Speed; " Visual Sequential Memory and " Visual Sequential-Spatial Integration.
Perceptual Visual Tracking Program (PVT): If there has been a diagnosis of dyslexia, rapid automatized naming deficit, reading potential below ability, ocular motility problems, eye movement disorders, temporal visual processing disability, visual perception dysfunction, then the Perceptual Visual Tracking Program (PVT) may be useful.
Home Therapy Systems (HTS): It's a computerized program that helps eliminate the symptoms of eyestrain. This is the most common visual complaint of students and office workers today.
Keystone Correct Eye Scope: The Keystone Correct Eye Scope teaches the student how to improve binocular vision (especially if one eye is being ignored or suppressed by the brain), tracking (saccades) and fine motor coordination.
Sherman Red Green Playing Cards: Sherman Red Green Playing Cards are a fun way to work on visual suppressions, binocularity and speed of processing.
"Lifesaver" Circle Cards: "Lifesaver" circle cards are an advanced procedure to improve binocularity and depth perception. Skill in this area translates to better visual attention and depth perception - critical components in successful visual learning.
Vectograms: Various vectograms (two pieces of polarized plastic that when viewed together with Polaroid glasses will give the perception of 3-D or depth) from Stereo Optical Company help students to use both eyes together, develop depth perception and to reduce suppression.
The Wayne Talking Pen: An infra-red light and fiber optic sensor in the tip of the pen sense reflection as the user traces a pattern with the pen and provide immediate auditory feedback if the user wanders off the pattern.
The Wayne Vis-Flex: This instrument is an excellent instrument for developing greater visual awareness, accuracy, and fluidity in free space.
Sherman Red Green Toy Box: Many materials from Red Green Toy Box, Tools for Vision Enhancement and Bernell are used to help with vision problems such as lazy eye, crossed eye and other binocular problems. Click here for more information - Sherman Red Green Toy Box