3 levels NF Hart chart: endpoint?

3 levels NF Hart chart: endpoint?

• A. Near card at 40 cm
• B. Near card at 6 inches
• C. Near card held 3 inches from the eye
• D. Near card at 1 inch

Answer: (C)

In this test, you’re looking for the closest distance at which the patient can still clearly resolve the smallest print on the three-level Hart card. The three levels correspond to fixed distances: about 40 cm, roughly 15 cm (6 inches), and about 7.5 cm (3 inches). The endpoint is reached when the card is held at the closest distance where the patient can still read the smallest line clearly. That distance is 3 inches from the eye, so the endpoint is near card held 3 inches from the eye. Distances farther away test easier levels and aren’t the endpoint.

In this test, you’re looking for the closest distance at which the patient can still clearly resolve the smallest print on the three-level Hart card. The three levels correspond to fixed distances: about 40 cm, roughly 15 cm (6 inches), and about 7.5 cm (3 inches). The endpoint is reached when the card is held at the closest distance where the patient can still read the smallest line clearly. That distance is 3 inches from the eye, so the endpoint is near card held 3 inches from the eye. Distances farther away test easier levels and aren’t the endpoint.