Graham-Field Rosenbaum Pocket Vision Screener Card Eye Chart

Features of Rosenbaum Eye Chart

• Durable, laminated plastic fits easily in a pocket for quick, convenient visual acuity screening
• Provides 20/800 distance equivalent testing at 14"
• Precise, clear, legible pocket eye chart
• Used to determine the most miniature letters you can read on a standardized chart
• The back of the card features a millimeter scale and an inch scale

How to use Graham-Field Rosenbaum Chart?

Visual acuity (Va) can be assessed by using the Pocket Vision Screener (not to be confused with the larger Snellen eye chart). The Pocket Vision Screener gives a distance equivalent to Va even though the card is held 14" from the patient. Va testing is done in the following manner:

1. Have the patient wear their corrective lenses (if any), make sure the card is evenly illuminated, and instruct the patient to hold the test card 14" away from their eyes. Corrective lenses are worn in order to determine the "best-corrected Va.
2. Ask the patient to cover their left eye (the right eye is always examined first).
3. Ask the patient to say each letter or read each word on the line of most minor characters that are legible on the card.
4. Record Va for the right eye according to the accepted notation method.
5. Repeat the process for the left eye and then with both eyes view the test card and record Va.
6. Patient's who cannot see the letters or numbers on the card should have their vision recorded as count fingers (e.g., CF at 5ft), hand motion (e.g., HM at 2 ft), light perception (LP), or no light perception (NLP).