Card includes one horizontal row and one vertical row of letters. When the hole in the card is illuminated, the patient holds a Maddox rod over their eye and reports the location of the line on the card. In this way, the extent of the phoria can be measured. Dimensions: 4.75 by 5.5 inches.
Modified Thorington Test Card
Product Number: 15111
Purchase Gulden’s Modified Thorington Test Card. This card is used in conjuction with a Maddox rod and illumination source to measure the extent of horizontal and vertical phorias.