Stereopsis Tests (Randot or Titmus Tests)

A stereopsis test is a simple, non-invasive diagnostic tool used to measure your depth perception, or 3D vision. This crucial ability relies on both of your eyes working together seamlessly as a team, a skill known as binocularity. At Pristine Eye Hospitals in Hyderabad, we use tests like the Randot or Titmus tests to accurately assess this function as part of a comprehensive eye evaluation.

What is a Stereopsis Tests (Randot or Titmus Tests)?

A stereopsis test uses the principle of stereograms to evaluate how well your brain fuses the slightly different images received from each eye into a single, three-dimensional view. The test typically involves a booklet with various images and a pair of special polarized glasses. These glasses ensure each eye sees a slightly different image; when viewed by someone with normal binocular vision, certain objects or patterns in the booklet appear to “pop out” or float above the page, demonstrating depth. The test allows our specialists to precisely measure the finest level of depth you can perceive.

Why is this test performed?

This test is essential for evaluating the quality of binocular vision and is performed for several key reasons:

To diagnose and monitor strabismus (squint): It helps determine how a misalignment of the eyes is impacting the brain’s ability to see in 3D.

To screen for amblyopia (lazy eye): Poor stereopsis is a common sign of amblyopia, especially in children, as the brain may be suppressing the image from the weaker eye.

To assess visual function after surgery: The test helps track the improvement in binocularity following procedures like squint correction surgery.

To evaluate suitability for certain professions: Excellent depth perception is critical for roles like pilots, surgeons, and heavy machinery operators.

How to Prepare for Your Stereopsis Tests (Randot or Titmus Tests)

There is very little special preparation needed for a stereopsis test. It is a quick and straightforward part of a comprehensive eye check-up.

Bring your current prescription eyeglasses or wear your contact lenses to the appointment.

Be ready to inform the ophthalmologist about your medical history and any vision problems you are experiencing.

No fasting or eye drops are required specifically for this test.

The Procedure: What to Expect Step-by-Step

The process is simple, interactive, and completely pain-free.

1. You will be seated comfortably and given a pair of polarized glasses to wear over your eyes (or over your own glasses).

2. Our eye specialist will show you a test booklet containing a series of images, such as circles, shapes, or animals.

3. You will be asked to point to or identify which shape in each series appears to be floating or closer to you.

4. Your responses are recorded to determine your stereopsis level, measured in units called “seconds of arc.”

Understanding Your Results

The results of your stereopsis test provide valuable information about how well your eyes work together. A high level of stereopsis (indicated by a low number in seconds of arc) signifies excellent binocular vision and depth perception. This means your brain is successfully fusing the images from both eyes to create a rich 3D view of the world.

If the test reveals reduced or absent stereopsis, it may indicate an underlying condition like strabismus, amblyopia, or another issue affecting binocular function. Our expert ophthalmologists at Pristine Eye Hospitals will discuss your results with you in detail, explain what they mean for your eye health, and recommend a personalized treatment plan if necessary.

Frequently Asked Questions