Pediatrics: Evaluation of Strabismus and Amblyopia Flashcards
corneal light reflex
what is “central” in the C of CSM?
CSM method
tool to assess visual acuity in preverbal children
steadiness
what does the “S” in CSM stand for?
maintenance
what does the “M” in CSM stand for?
induced tropia test
In a child without strabismus, maintenance of fixation must be tested using this method
blinking, smooth pursuit
strong maintenance of fixation indicates persistence through these two distracting phenomena
contour interaction bars
when evaluating amblyopic children, these should be used surrounding individual optotypes to induce the crowding phenomenon
fogging
In a child with latent nystagmus, this technique may be useful to evaluate visual acuity
vergences
Which should generally be tested first, vergences or ductions?
cover tests, corneal light reflex tests, dissimilar image tests, dissimilar target tests
four basic types of ocular alignment tests
CSM method
what test should be passed before accurate cover testing can be employed?
heterotropia
in the cover test, movement of the uncovered eye indicates the presence of this
heterophoria
in the cover test, movement of the covered eye indicates the presence of this
alternate cover test
which cover test measures the total deviation present (both phoria AND tropia)?
simultaneous prism and cover test
cover test used to quantify the amount of heterotropia present
uncentral (UC)
term for light reflex that is not centered in CSM (with abbreviation)
maintenance
In the CSM method, this is only tested under binocular conditions
10-diopter prism, induced tropia test
required to test maintenance in a child with straight eyes (implement and test)
amblyopia
a strong fixation preference for the contralateral eye indicates this
Teller acuity test, Cardiff acuity test
two types of preferential looking tests, the latter of which is preferred in Europe and at Wash U
Cardiff acuity test
acuity test for preverbal children that uses vanishing optotypes and preferential looking behavior to test visual acuity
Allen test
visual acuity test used in preschool children that does not conform to the accepted parameters for optotype design