The Titmus fly test, also known as the Titmus stereo test or Titmus test, is a widely used assessment tool for evaluating stereopsis, which is the ability to perceive depth and 3D vision.

How it works:

1. Polarized glasses: The patient wears polarized glasses.
2. Image presentation: The patient views a series of images, including a fly or other objects, through the polarized glasses.
3. Depth perception: The images are designed to create a sense of depth, and the patient is asked to identify the objects or shapes that appear to be raised or recessed.

Purpose:

The Titmus test is used to:

1. Assess stereopsis: Evaluate the patient’s ability to perceive depth and 3D vision.
2. Detect binocular vision problems: Identify issues with binocular vision, such as strabismus or amblyopia.
3. Monitor treatment progress: Track changes in stereopsis during treatment or therapy.

Common applications:

1. Pediatric vision screening: Often used in children’s vision screenings to assess depth perception.
2. Vision therapy: Used to evaluate and improve binocular vision and stereopsis.
3. Occupational vision assessments: May be used in certain occupations that require depth perception.

The Titmus fly test is a valuable tool for assessing stereopsis and binocular vision, helping practitioners diagnose and manage vision problems.