Ace the COT Challenge 2025 – Shine Bright as a Certified Ophthalmic Technician!

Question: 1 / 400

Which statement about Snellen visual acuity is TRUE?

It can only be used with standard symbols.

It contains an adjustment for changing the size of symbols on the screen.

The statement that Snellen visual acuity contains an adjustment for changing the size of symbols on the screen is true. The Snellen chart is designed to assess visual acuity by presenting letters or symbols at various sizes. The principle behind the chart is to measure how well a person can distinguish letters at a standardized distance, generally 20 feet in the United States. When using a digital Snellen chart, the size of the letters or symbols can indeed be adjusted to accommodate different viewing conditions or to more accurately assess a person's visual ability.

This adaptability is crucial for ensuring that the test is accurate and relevant to each individual being tested, as it allows practitioners to ensure that the symbols presented match the size appropriate for the patient’s potential acuity. The reliability of the test depends significantly on these adjustments, ensuring that it provides an effective measure of visual function.

Get further explanation with Examzify DeepDiveBeta

It measures color perception only.

It is not reliable for determining visual impairment.

Next Question

Report this question

Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy