Amblyopia Flashcards
Defect of central vision.
Amblyopia
If you have Amblyopia what are some of the diseases that you can get
Strabismus
Anisometropia
Stimulus Deprivation
True or False. Children with amblyopia or at risk for
amblyopia should be identified at a young age
when the prognosis for successful treatment is
best.
True
It is a classification of Ambyopia taht results from
competitive or inhibitory interaction between
neurons carrying the nonfusible inputs from
the two eyes.
Strabismic Amblyopia
It develops when unequal refractive error in the two
eyes causes the image on the one retina to be
chronically defocused.
Anisometric Amblyopia
1-2D
Mild hyperopic or
astigmatic anisometropia
Less than 3D
Mild myopia anisometropia
Less than 6D
unilateral high myopia
True or False. The eyes of a child with anisometropic
amblyopia look normal to the family and
primary care physician.
True
Result from large, approximately equal, uncorrected refractive error in both eyes of a young child.
Isometric Amblyopia
Hyperopia exceeding 5D & myopia excess of
10 D
Risk Bilateral Amblyopia
Uncorrected bilateral astigmatism in early
childhood may result in loss of resolving
ability limited to chronically blurred
meridians.
Meridional Amblyopia
It is usually caused by congenital or early
acquired media opacity.
Stimulus Deprivation Amblyopia
True or False. In children younger than 6 years with
congenital cataract that occupy the central
3mm or more of the lens, must be considered
capable of causing severe amblyopia.
True
True or False. Similar lens opacities acquired after 6 years are generally less harmful.
True
A form of deprivation caused by excessive therapeutic patching.
Occlusion Amblyopia
True or False. Small polar cataracts & lamellar cataracts may cause mild to moderate amblyopia or may have
no effect on visual development.
True
Give atleast 1 diagnosis
Characteristics of vision alone cannot be used
to reliably differentiated amblyopia from other
form of visual loss.
Give atleast 1 diagnosis
The crowding phenomenon is typical for
amblyopia but not uniformly demonstrable.
Give atleast 1 diagnosis
Afferent pupillary defect are Characteristic of optic nerve disease but occasionally appear to be present with amblyopia
Give atleast 1 diagnosis
Multiple assessment using a variety of tests or
performed on different occasions are
sometimes required to make a final judgment
concerning the presence and severity of
amblyopia.
a test for estimating the relative level of vision
in the two eyes for children with strabismus
who are under the age of about 3.
Binocular Fixation Pattern
allow the examiner to test the crowding phenomenon with isolated optotype. Bar surrounding the optotype
mimic the full optotype to the amblyopic child.
Crowding bar or
Contour interaction bars
Treatment for Amblyopia
Correcting refractive error
Treatment for Amblyopia
Forcing use of the poorer eye by limiting use
of the better eye.
It is the most powerful means of treating of
amblyopia by enforced use of the defective eye.
Occlusion Therapy
Defined as occlusion for 1-6 hours per day.
Part Time Occlusion
This form of treatment has recently been
demonstrated to be as effective as patching for
mild to moderate amblyopia.
Penalization
Penalization is composed of
atropine 1% or
homatropine 5%
True or False. When amblyopia treatment is discontinued after fully or partially successful completion, approximately half of patients show some degree of recurrence.
True
