Transcript ALTERATIONS IN NEUROSENSORY FUNCTION

Introduction to Visual Functioning
FUNCTIONS OF EYE
 Highly specialized sense organ
 Guides most of one’s daily activities
 Enables one to interact with the environment safely
General Assessment
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Patient history
Nutrition history
Family history and genetic risk
Current health problems
Patient History
 Review age and gender
 Occupation/Leisure activities
 Medical problems
 Medications
 Dietary History
Snellen Chart
Diagnostic Tests
 Imaging assessment
- Cat Scan, MRI
 Slit-lamp examination
- magnifies anterior eye structure
 Corneal staining
- assesses corneal surface
 Tonometry
- measures intraocular pressure
OTHER DIAGNOSTIC TESTS
-flourescein angiography
 -electroretinography
Diagnostic Tests (Cont’d)
IOP Estimation
WORLD HEALTH ORGANIZATION (WHO)
Facts on Blindness and Visual Impairment
-world wide 314 million visually impaired
- 153 million r/t uncorrected refractory errors
-up to 80% adult blindness is preventable/treatable
-in children, 1.4 million under 15 yrs old are blind
-3 major causes of avoidable peds blindness
cataracts
vitamin A deficiency
retinopathy of prematurity
http://www.who.int/features/factfiles/blindness/en/ind
ex.html
VISION 2020
 Global initiative working together to eliminate
avoidable blindness
 Organizations: WHO and International Agency for
Prevention of Blindness
 Strategies: through education
mobilization of resources
utilization of infrastructure and technology
 Results: infectious disease (trachoma) has decreased
 http://www.vision2020.org/main.cfm?type=VISION2020
MISSION