Description
The Snellen Eye Chart (Alphabet-Type-II) is a standard vision testing chart used to measure the clarity of distance vision. It is widely employed in schools, clinics, and homes to screen for nearsightedness, which can cause blurry distance vision, especially in children. The chart is also useful for determining if a person meets the legal visual acuity requirements for a driver’s license (commonly 20/40 in most regions).
This eye chart helps users monitor and assess their visual acuity and detect any potential vision problems early. For accurate testing, it is recommended to have an assistant help with the evaluation. Users should wear their glasses or contact lenses if required for distance vision during the test.
Directions for Use
-
Place the chart on a wall or easel 10 feet away from the test subject.
-
Cover one eye completely using a hand, large spoon, or another item (do not apply pressure).
-
Identify a line on the chart that can be read comfortably and read the letters aloud. Have an assistant record your accuracy.
-
Continue reading letters on successively smaller lines without squinting.
-
Stop when less than 50% of the letters on a line are correctly identified.
-
Switch to the other eye and repeat the test.
The Snellen Eye Chart Alphabet-Type-II is a reliable and easy-to-use tool for vision assessment, helping healthcare providers, educators, and individuals monitor visual health efficiently.
