And, now, Dr. EYEnstein’s home turf: Research!
We have published and continue to research and work to publish in
areas of binocularity. Dr. Hussey has
gone past 30 papers published, almost entirely in peer-reviewed journals. PDFs of those papers are here for reading and
downloading. Always remember that the
papers are aimed at a professional audience, so they may not be written in the
most reader-friendly way.
Also in this area are some videos either from our research with
Eyetronix, or some videos Dr. Hussey made to explain problems with binocular
vision in a more friendly video format.
In addition, one of the major instrument manufacturers asked Dr. Hussey
to provide case studies using the hand-held retina photo device we use. That was a nice diversion.
Dr. Hussey has consulted with or is consulting with Eyetronix, PinpointEyes (Hyperion Labs), and Luminopia, but is not a paid consultant.
Standard clinical treatment methods for amblyopia penalize the non- amblyopic eye, with subsequent compliance problems, and do not address the associated binocular vision abnormality.
Intermittent central suppression (ICS) is a repetitive loss of sensation in central vi- sion that occurs in the absence of strabismus and amblyopia. We used electronic rapid alternate occlusion to treat the ICS of 10 students enrolled in a Job Corp’s residential educational program.
Idealized or “thought” experiments can be used to investigate theoretical principles. The present idealized experiment uses a neurological rheostat to decrease magnocellular signal in an otherwise visu- ally normal subject to probe for possible consequences of the magnocellular impairment that is often linked to reading problems (dyslexia).
Current visual sensory theory focuses on the dual pathway nature of the visual sys- tem. Two pathways carry information from the eye to the brain, the parvocellular (detail and color) and magnocellular (motion) pathways. The magnocellular pathway has been implicated as a cause of dyslexia. Clinically, intermittent central suppression has been shown to be associated with reading problems.
Both magnocellular pathway defects and intermittent central suppression show links to dyslexia. The prior paper suggested a theory of intermittent central suppression based on a magnocellular pathway defect. This paper expands on that theory and suggests some further implications particularly for reading, amblyopia and the need for further research.
Do two eyes have any intrinsic advantage over one eye for combat marksmanship? Intuitively, having two eyes work together (binocularity) seems beneficial.
Early or congenital cataract is typically treated with early surgery, commonly without pseudophakic implants. Surgery is o9en followed with patching and optical correction, including extended wear contact lenses. Some level of amblyopia is expected to persist depending on how early surgery is performed and what post- surgical therapies are accomplished.
Intermittent central suppression (ICS) is an afferent sensory defect in vision that interferes with detail vision producing symptoms of “dyslexia.” Our knowledge of ICS has suffered due in part to lack of routine testing. This paper proposes the routine use of ICS testing as developed by the author.
To evaluate compliance and quality of life with a novel technique for amblyopia treatment (Eyetronix Flicker Glass, EFG) in a group of children who had been previously and unsuccessfully treated by patching.
Intermittent central suppression (ICS), an intermittent loss of central visual sensation, has been associated with reading problems.
Amblyopia is a neurological development disorder that presents with deficits in spatiotemporal vision processing resulting from an active suppression process.
Whiplash cervical trauma has been shown to cause visual changes. Intermittent central suppression (ICS) has been shown to be associated with reading problems.
Central suppression is found with different types of strabismus and amblyopia. Intermittent central suppression (ICS) is an intermittent loss of visual sensation in the area of central vision occurring in the absence of strabismus and amblyopia.
Seth, a 16-year-old male student-athlete, suffered a concussion during trail riding in 2014 when his bike came apart during a jump. The patient’s occupational therapist referred him for a vision examination and therapy following vestibular therapy. Unresolved post-concussion symptoms included headaches, problems seeing the ball in sports, and reading problems reminiscent of “dyslexia.”
Much work has been done searching for a link between vision problems and reading problems. Certainly, a strong case can be made that ocular motor malfunctions can affect reading efficiency.
Vision science defines the fundamental action of the vision system to be the generation of visible percepts. Intermittent central suppression (ICS) is an intermittent, usually alternating, loss of visual sensation, a repetitive loss of that visual percept.
Imagine going to school for eleven years not being able to read;
Problems with cell phone signals getting to my new iPhone 7 provide an analogy for one of the primary sensory defects vision therapy can deal with, suppression and intermittent central suppression in particular.
Hall and Wick point out some of the disagreement in the literature among methodologically sound studies researching a visual basis for reading problems.
Intermittent central suppression (ICS) is a repetitive intermittent (‘‘on-and-off’’) loss of central visual sensation without strabismus or amblyopia. These repetitive seconds-long suppressions have been suggested to create visual confusion and instability that would cause vision symptoms, contribute to reading complaints, and even impair reading.
I present a discussion suggesting visual flicker is motion in stimulus form. Repetitive flicker should improve magnocellular function, and by extension reading disabilities and intermittent central suppression.
Sudden onset diplopia can be the result of underlying systemic or neurological conditions. I present the case of a 32-year-old woman with a previously diagnosed convergence insufficiency, who developed sudden diplopia.
Intermittent central suppression (ICS) is a repetitive suppression of central vision in non-strabismic/non-amblyopic individuals. Preliminary estimates have been made of the temporal and spatial characteristics of ICS. ICS has been implicated in reading problems.
Gold standard penalization therapies for amblyopia are thankfully being challenged by new techniques and new technologies. One such technology, rapid alternate occlusion or alternating flicker was recently studied and improved visual acuity and stereopsis in anisometropic amblyopes.
The conventional wisdom on suppression as a cortical competitive inhibition is difficult to reconcile with the clinical picture of intermittent central suppression (ICS). Equally difficult is to reconcile the suggested link of ICS to reading problems (symptoms of dyslexia) with the hard science on the visual pathways in dyslexia.
In June of 2010, Joint Conference on Theoretical and Clinical Optometry, a discussion- oriented educational meeting sponsored by OEPF and hosted by Pacific University, addressed ADD/ADHD.
Non-strabismic intermittent central suppression is a loss of visibility at the level of the lateral geniculate nucleus. When put into a developmental context, this implies that all amblyopia has a deprivation component.
Fixation is the pause in saccadic eye movements that allows visual information to be sent to the cortex. Small fixational eye movements support stability of sensation during fixation, but yet to be established is whether stable sensation is required for properly controlled fixational eye movements.