peds HEENT Flashcards
myopia (nearsightedness)
proximal clear, distant blurry
-inherited, lifestyle
myopia s/s
difficulty seeing things that are far away, may squint to try and see things clearly
tx of myopia
refer to optometry/ophthalmology
-requires glasses or contactst
hyperopia (farsightedness)
distance clear, proximal blurred
if uncorrected–> esotropia (crossed eyes) and amblyopia
s/s of hyperopia
can’t read books, difficulty seeing screen, difficulty seeing thing that are close
**mild hyperopia normal refractive state for infants/children
-contraction of ciliary body–accommodation and focus
tx of hyperopia
refer to ophthalmology as it may interfere with learning or lead to amblyopia
amblyopia
secondary to abnormal visual development early in life–decreased visual acuity (fine depth perception)
unilateral= >/2-line difference in visual acuity between eyes
bilateral= visual acuity worse than 20/40 in either eye (in children >/4 yrs) OR worse than 20/50 in either eye (in children </3 yrs)
**limitation= difficult to measure in small children
eval of amblyopia
estimation of visual acuity in young children and dx of amblyopia require a complete eye exam by a skilled eye care specialist
strabismus
type of amblyopia
ocular misalignment–foveal misalignment
2 different images that can’t be fused into one
leads to suppression of one eye by the visual cortex
suppression–deviation relatives to the fixated eye (fixated eye= the eye getting the clear image)
prefix= direction
exo=outward
eso=inward
hyper=upward
hypo=downward
suffix= condition
phoria= latent, in the presence of a disruption in binocular vision
tropia= manifest, occurs in the absence of binocular vision disruption
hx
-developmental/birth hx
-medical hx: head trauma, other conditions, exposure to toxins (ex: lead)
-meds
-family hx
-OLDCART
physical exam: strabismus
general appearance
head posture/tilt
opthalmic exam: cover test, cover/uncover test, Bruckner test, corneal light reflex
cover/uncover test
detects latent strabismus. **if the cover test is positive, the cover/uncover test doesn’t necessarily need to be done. if the cover/uncover test is negative, then you want to the cover/uncover test
child will focus on a target, a cover is placed over one eye for a few seconds. then it is rapidly removed. the eye that was covered is observed and noted for the refutation movement back to center and latent strabismus is identified.
cover test
child should be focused on a target, you want to cover one eye while observing the opposite eye for movement. if no movement detected, that is considered normal. if strabismus or tropia, the eye that is not occluded with the cover test shifts to refixate on the target. the test should be repeated on each eye. a positive cover test–> should be referred.
Bruckner test (simultaneous red reflex test)
checks the red reflex and makes sure it is symmetrical and the pupils are checked for color, symmetry, size, shape, and brightness.
Asymmetry–> referral to pediatric ophthalmologist immediately as this could indicate a series ocular disorder, caner for strabismus, opacities, and retinal tumors
tx for strabismus
early recognition for prompt referral to opthamlmolgy
tx may include:
-corrective lenses
-prism lenses
-botox
-vision therapy
-occlusion therapy
-pharm penalization
-surgery
observation and regular follow-up
At 21 days gestation
BL ocular tissue visible
8 weeks, 6 days
eyelids completely formed, upper/low lids fuse to seal the eye while it develops