Description

The Adult Thorington Card is an essential tool for eye care professionals, designed to accurately measure heterophoria and ocular deviations during near vision tests. This specialized card is used alongside a Maddox Rod to evaluate eye alignment when fusion is disrupted, helping to diagnose conditions such as uncrossed or crossed diplopia and various vertical deviations.

Key Features

• Optotype Design: The card employs a combination of numbers and letters, with each optotype representing 1 prism diopter. This allows clinicians to measure deviations within a range of +/- 12 diopters.
• Central Fixation Hole: A 1 mm hole at the center of the card accommodates a fixation light, enhancing the precision of assessments.
• Directional Markings: Printed scales and markings on the card indicate the direction of deviation, including eso, exo, hyper, and hypo, facilitating quick and repeatable assessments.

Versions

The Adult Thorington Card is available in two versions:

• Penlight/Transilluminator Attachment: Compatible with external light sources (not included).
• Push Button LED Light: Features a built-in LED for convenient use.

Specifications

• Dimensions: 5.75 in x 4.75 in (147 mm x 121 mm)
• Certification: CE approved

Intended Use

This card is particularly beneficial for clinicians and paraoptometric technicians, especially when patients are uncomfortable with a phoropter or require more precise measurements than standard cover tests provide. During an exam, the patient holds the Maddox Rod over one eye while the practitioner shines a light through the card’s central hole at a standard testing distance. The patient then reports the alignment of the line formed by the Maddox Rod against the card’s scale, determining the type and magnitude of deviation.

Clinical Applications

The Adult Thorington Card is invaluable for assessing binocular vision and quantifying ocular deviations in adults. It aids in diagnosing phorias and tropias, offering quick, precise, and repeatable measurements in various clinical settings. This makes it a crucial instrument for eye care professionals seeking reliable diagnostic outcomes.