TX Vision & Hearing Testing Exam
Questions and Answers (Graded
A)
Refractive error - ANSWER - a cornea or lens issue causes the eyes to receive and
send different signals to the brain due to not being able to bring light rays into a
single focus
What are myopia and hyperopia? - ANSWER - nearsightedness and farsightedness,
which have to do with a large difference in visual acuity between the right and left
eyes. the focus is off at either far or close distances
what is an astigmatism? - ANSWER - irregular curvature of the cornea which results
in unequal refraction within the same eye. images looked blurred together
what is strabismus? - ANSWER - a muscle imbalance between both eyes resulting in
either esotropia (cross-eyed) or exotropia (lazy eyes)
what is amblyopia? - ANSWER - the eye and brain don't work together causes one
eye to "dim". it is the MOST COMMON vision impairment in children and IMPROVES
SIGNIFICANTLY if caught early
what are s/s of vision problems? - ANSWER - crossed eyes
red/watery eyes
squinting
covering one eye
turning the head to use one eye
leaning in
how to know if a child passes the vision line in letter chart? - ANSWER - >50%
symbols correctly identified
, can the child wear their prescription glasses while taking the exam? - ANSWER -
yes, they should.
how do you determine the visual acuity score in the letter chart? - ANSWER - it is
the score associated with the last line correctly read/passed
For children 4 and younger, what is the passing line? - ANSWER - 20/40
Which distance acuity charts are approved for Texas screenings? - ANSWER - HOTV
and Sloan Letter
When is the HOTV chart appropriate? - ANSWER - 4-5yo or children that don't know
the alphabet
Must know/learn concept of matching
When is the Sloan letter chart appropriate? - ANSWER - Ages 6yo+ and know the
alphabet
A screening area should consist of - ANSWER - -a quiet area
-room at least 2ft longer than screening chart requirements (so min. 12-22ft)
-uncluttered, nonpatterned wall for chart mounting
normal lighting without shadows or glares on chart
What supplies do you need for screening? - ANSWER - -cover cards for revealing one
line at a time or revealing one symbol/letter at a time
-steel measuring tape to measure distance
-masking tape to mark where child stands
-footprints to mark where the child should stance
-occluders to completely block vision in one eye
-plain or brown butcher paper to provide uncluttered background by chart
-1+ gooseneck lamps
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