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Visual acuity

Visual assessment in children pediatric
ophtalmology (prevention by premature diagnosis)
• Age Groups:
• Infants <1 y
• To...
Visual Assessment in Children pay
attention:look for pediatric ophtalmoloist
• Pupil size, ligth reaction
• Ocular Motilit...
Contrast sensitivity
• Sensibility to perceive sligth colour changes

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Visual acuity in  infants
Visual acuity in infants
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Visual acuity

  1. 1. Visual assessment in children pediatric ophtalmology (prevention by premature diagnosis) • Age Groups: • Infants <1 y • Toddlers 1- 4 years • Children : 5 – 14 years • Adolescents: 15- 17 years • Adults > 18 years
  2. 2. Visual Assessment in Children pay attention:look for pediatric ophtalmoloist • Pupil size, ligth reaction • Ocular Motility • Red Reflex • Child Observation
  3. 3. Contrast sensitivity • Sensibility to perceive sligth colour changes
  4. 4. Vision Assessment prevent by premature diagnosis • Optometry:Distance visual assessment • Refratometry • Ophtalmoscopy • Optical Choerence Tomography
  5. 5. Factors that affect visual acuity • Refractive errors, glaucoma and retinopathy • Pupil Size • Adaptation of the eye • Illumination
  6. 6. Visual Assessment (tests) • Distance Visual Acuity ( snellen chart) • Near Vision
  7. 7. Distance Visual Acuity
  8. 8. Standart Test Distances • Distance Visual Acuity: 6m or 20ft is equivalent to optical infinity • Near Vision : 40 cm.
  9. 9. Snellen Chart
  10. 10. Conversion scales (LogMar to Snellen)
  11. 11. Visual Scales snellen and (MAR) minimum angle resolution
  12. 12. Distance vision • Two points can be visible when they are separated by a angle of 1 minute in nodal point of the eye.
  13. 13. Normal fundus of rigth eye (OCT)
  14. 14. Normal fundus of left eye.(OCT)
  15. 15. Thank You

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