CVI AKA Cortical Blindness Neurological Visual Impairment Region 4 Charlotte Conner Regan Marburger Sarah Mays Kelly Hill Christy Moody What is CVI Most commonly seen in children Not caused by eye condition ID: 249927
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Cortical Visual Impairment(CVI)(AKA: Cortical Blindness, Neurological Visual Impairment)
Region 4Charlotte Conner, Regan Marburger, Sarah Mays, Kelly Hill, Christy MoodySlide2
What is CVI??Most commonly seen in childrenNot caused by eye conditionDisturbance in visual pathway and function of the brainAffects the posterior visual pathways and/or occipital lobesCVI can range from mild to severe and can range from temporary to permanentSlide3
CharacteristicsEye exam appears normalShort visual attention spanSome light sensitivityLight gazingClose viewing of objectsNeither neurological handicaps presentLooks away when reaching
Will listen rather than lookDifferences with visual noveltySlide4
CausesHead injuryBrain damage Cerebral TumorMalformation of the brain
Epilepsy (Status Epilepticus*)Meningitis (Bacterial*)
Cardiac Arrest*
Shunt Malfunction
Hypoxia/ anoxia of the brain (possibly at birth or from near SIDS incidents)Slide5
Other Condition Related to CVIMost students with CVI are multiply impaired, to name a few…Other Condition Related to CVI Cerebral PalsyIntellectual Disability
HydrocephalusMicrocephaly *Poor prognosisSlide6
Clinical Testing to DiagnoseERG-ElectroretinographyEEG-ElectroencephalographyVEP-Evoked Potential (spontaneous response)
VEPM-Visual Evoked Potential MappingFPL-Forced Preferential LookingMRI-Magnetic Resonance Imaging
CT-computed tomography
SPECT: single-photon emission computed tomographySlide7
Functional Vision AssessmentInformal observationsCollection of anecdotal recordsInterviews with parents and significant othersFormalized and structured observationsInformal screening using standardized vision screening materialsVisual latencySlide8
Instructional StrategiesHigh contrast and simple materials presented at one timeBright lighting to help keep the child’s visual attentionUse a multisensory approachRepetition and routineAcuity is measured by complexity.
Look Away-TouchReflective movement of items for trackingSlide9
More Instructional ActivitiesTell student what they are seeing and encourage them to feel and explore it.Restrict the number of people who are involved in intervention.Visual images should be simple and presented in isolation.It may be necessary to turn off a light or use diffused lighting to get students to focus on a task.Slide10
TreatmentTreatment varies with each student and the underlying neurological disease.Early intervention is key to stimulate visual developmentSlide11
Case Study & Fact SheetSee MS Word documents 2007 (*.docx)See www.charlyconner.info after July 26, 2010
Video
http://www.youtube.com/watch?v=WUmHp4P3OegSlide12
ReferencesAAPOS. (2010). AAPOS :: Cortical Visual Impairment. American Association for Pediatric Ophthalmology and Strabismus. Retrieved July 01, 2010, from http://www.aapos.org/faq_list/cortical_visual_impairment
American Printing House for the Blind, Inc. (2010, March 2). What is CVI? American Printing House for the Blind. Retrieved July 01, 2010, from
http://www.aph.org/cvi/define.html
Demchak
, M., Rickard, C., &
Elquist
, M. (
n.d
.). Tips for home and school Cortical Visual Impairment.
University of Nevada, Reno
. Retrieved January, 2003, from
http://www.unr.edu
Good, W.V., Jan, J.E.,
Skoczenski
, A., & Candy, R. (2000). Recent advances in cortical visual impairment.
CVI Home Articles and Videos Research.
Retrieved July 24, 2010 from
http://www.aph.org/cvi/articles/good_1.html
Morgan, S. (2002, July 30). Neurological Visual Impairment - Also Known as: Cortical Visual Impairment, Delayed Visual Maturation, Cortical Blindness.
Texas School for the Blind and Visually Impaired
. Retrieved July 01, 2010, from
http://www.tsbvi.edu/Outreach/seehear/winter01/nvi.htm
Palmer, C. (
n.d
.).
CHILDREN WITH CORTICAL VISION IMPAIRMENT: IMPLICATIONS FOR EDUCATION
(pp. 1-15, Rep.). School of Special Education and Disability Studies. Retrieved July 1, 2010.
Christine Roman-
Lantzy
,
Formost
Professor in the field of CVI, retired. Find her on Google.
NOVA Clinic, University of Houston, Houston, Texas, Low Vision Clinic for Low Functioning Children
Part of the University Eye Institute, the NOVA Clinic meets the vision needs of multiple challenged individuals.
For information, contact:
Viola Rivera
Coordinator, Specialty Clinics
(713) 743-2005
E-mail:
vrivera@uh.edu
Web page:
http://uei.uh.eduSlide13
TeamworkCharlotte- oral presentationRegan & Sarah- PowerpointChristy Moody- fact sheetKelly Hill- case study