Vision Screening and Ophthalmology
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Transcript Vision Screening and Ophthalmology
CHILD HEALTH SURVEILLANCE
Vision Screening & Eye Problems
Gordon N Dutton
Emeritus Professor of Visual
Science
Paediatric Ophthalmologist
Importance of surveillance
Detects life threatening conditions
- very rare
Detects sight threatening conditions
- common
Detects genetic conditions
- occasionally
Detects cosmetic conditions
- fairly common
Eye Screening
6 weeks
Birth
4 or 5 years
GP
Paediatrician
Orthoptist
6 Week Check
Vision: fixing & following
External examination
lids
cornea
pupil
Red reflex
direct ophthalmoscope
Visual Assessment in Children
Visual acuity
Corneal light reflection
Cover test
Eye movements
Tests of stereopsis
Refraction
Red reflex
Dilated fundoscopy
Visual Acuity in Kids
Fixing and following light or toy
“Objection to occlusion”
Preferential looking tests
Identifying or matching pictures or
letters
Vision reduced in both eyes
Wrong test for age or ability
Poor attention
Refractive error
Structural problem with eye
Central visual problem
Want glasses !
Vision reduced in one eye
Loss of attention
Refractive error
Amblyopia
Structural problem with eye
Central problem
Amblyopia
Unilateral poor vision in childhood in a
normal eye
Treat by patching the “good eye”
Glasses are often required
Easier to reverse the younger the child
If not reversed by age 7 or 8 then permanent
Amblyopia Treatment
Severity
Age
Full or part-time patching
Always with glasses
Preferably with close work
What Is an Orthoptist?
Responsible for the diagnosis and
management of patients presenting with
defects of binocular vision and disorders
of eye movement, e.g. squint, amblyopia,
diplopia and ocular muscle palsy.
Screening Role
Visual field assessment
Corneal light reflex
Strabismus
= Squint – eyes not pointing in same direction
Esotropia
Convergent squint
Associated with hypermetropia
(longsightedness)
Pseudoesotropia - frequently seen if
prominent epicanthic folds (broad nasal
bridge).
Esotropia
Accomodative Esotropia
Exotropia
Divergent squint
Often intermittent
Cover Test
A
B
C
D
Refraction
Test focus of eye by refraction
with a retinoscope and lenses.
Most glasses prescribed in
childhood for hypermetropia
(longsightedness).
If difference in focus between the
eyes (anisometropia) then risk of
amblyopia.
Red Reflex
Blocked Nasolacrimal Duct
Most resolve spontaneously
Refer if no resolution by 1 year of age
No antibiotics unless “white of eye” is red
Massaging lacrimal sac may help
Congenital Glaucoma
Photophobia
Watering
Redness
Enlarged eye
Cloudy cornea
Chalazion
Apply local heat with
a clean facecloth
Massage towards
eye
10 mins twice daily
Surgery not required
in child
Beware Leukocoria !
= White Pupil
Retinoblastoma
Cataract
Toxocariasis
Uveitis
Retinal detachment
Other causes