Visual Acuity Testing Flashcards
7 cards from real CPOA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Visual Acuity Testing flashcards as text
What does 20/40 visual acuity mean?
Answer: The patient sees at 20 feet what a normal eye sees at 40 feet
20/40 means the patient must be at 20 feet to see what a person with normal vision sees at 40 feet.
Which chart is most commonly used for near visual acuity testing?
Answer: Jaeger card
The Jaeger card is the standard near vision chart, rated in J-units at a standard reading distance of 14–16 inches.
When documenting visual acuity 'cc', what does 'cc' indicate?
Answer: With correction (cum correctione)
The Latin abbreviation 'cc' (cum correctione) means the measurement was taken with the patient's corrective lenses in place.
A patient unable to read any letter on the Snellen chart at 20 feet should be tested by:
Answer: Counting fingers at a reduced distance
When a patient cannot read the 20/400 line, the examiner tests counting fingers (CF), hand motion (HM), light perception (LP), or no light perception (NLP).
The 'pinhole test' is used during visual acuity assessment to:
Answer: Determine if reduced VA is due to a refractive error
The pinhole occluder limits light rays to the central axis, bypassing refractive error; improvement in VA suggests an uncorrected refractive cause.
What is the standard testing distance for a projected Snellen chart in most US optometric offices?
Answer: 20 feet
The standard testing distance in the United States is 20 feet (6 meters), which is considered optical infinity for clinical purposes.
A child who cannot identify letters would best be tested using:
Answer: Tumbling E or HOTV chart
The Tumbling E or HOTV chart uses shapes or a limited letter set that pre-literate children can identify without knowing the alphabet.