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What are Red and Green Glasses?


3 min


red and green vision therapy glasses

Red and green glasses, often referred to as anaglyph glasses, are glasses used in vision therapy. These glasses have lenses of different colors, typically red and green or red and cyan. In this blog post, we will discuss what are red and green glasses and how they work.

What are Red and Green Glasses in Vision Therapy?

Red and green glasses assist patients with amblyopia and strabismus to use both eyes together. During dedicated exercises, the two images or objects, one in red and the other in green (or cyan), are usually overlapping on a screen. The goal is that the brain then combines these two images to create a single image.

How Do Red and Green Glasses Work

What is the Logic Behind Red and Green Glasses?

The patient wears the glasses and is shown a series of stimuli (images/objects) during the exercises. Objects covered by the green filter are invisible to the left eye when viewed through the green lens and invisible to the right eye when viewed through the red lens. A healthy person can combine the images from their left and right eye to create a single and unified image.

Example of AmblyoPlay Red and Green Glasses Combined with AmblyoPlay Eye Exercises

Important: Filter Glasses Need to Cancel with Activities!

Activities need to be optimized for red and green glasses or vice versa! If the objects in the exercises do not cancel, individuals could cheat by using only one eye to successfully complete the tasks.

That is the reason why AmblyoPlay Glasses are sold together with AmblyoPlay Vision Therapy programme. We ensure the maximum filtration of the glasses, which leads to optimal efficiency of therapeutic eye exercises.

AmblyoPlay vision therapy red and green filter glasses.

The Purpose of Red and Green Glasses

The purpose of using these glasses in vision therapy is to create a stereoscopic or three-dimensional (3D) effect by presenting different images to each eye. This technique is utilized in vision therapy for various purposes, including:

  1. Binocular Vision Therapy:
    Anaglyphic training helps improve binocular vision, which is the ability of both eyes to work together as a team. It can be beneficial for individuals with strabismus (eye misalignment) or amblyopia (lazy eye).
  2. Anti-Suppression Therapy: Suppression is a neurological adaptation that patients with unstable visual systems frequently learn, in which their brains blocks the visual input coming from one eye. In vision therapy, Anti-suppression exercises (red and green exercises) help the patient become conscious of a suppression, regain control, and learn how to keep both eyes “awake” at the same time.
  3. Depth Perception Enhancement:
    By presenting slightly different images to each eye, anaglyphic training can enhance depth perception. This is crucial for tasks such as judging distances and spatial relationships.
  4. Visual Processing Improvement:
    Anaglyphic training can stimulate the visual system and improve the processing of visual information in the brain. It may be used as part of a comprehensive vision therapy program to address visual processing difficulties.
  5. Eye Tracking and Coordination:
    The use of red-green glasses can also assist in improving eye tracking and coordination, which are essential for smooth, accurate eye movements.


In conclusion, the use of red and green glasses in vision therapy, known as anaglyphic training, offers a unique approach to address issues like strabismus and amblyopia. These glasses, with their distinct color lenses, stimulate the brain to improve binocular vision, depth perception, and overall visual processing.

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Frequently Asked Questions

What is the primary purpose of using red and green glasses in vision therapy?

The red and green glasses, known as anaglyph glasses, serve the purpose of binocular training in vision therapy. They present slightly different images to each eye, stimulating the brain to improve binocular vision, depth perception, and visual processing.

How do red-green glasses contribute to vision rehabilitation?

Training encourages both eyes to work together, addressing conditions like strabismus and amblyopia. By creating a stereoscopic effect, these glasses help improve eye coordination and enhance the brain’s ability to process visual information.

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Why Do We Suggest a Minimum Time of 6 Months for Success?

Based on the data from over 15,000 patients using AmblyoPlay, improvements start within 4 months, while optimal results take anywhere between 6-18 months on average. The duration of required training depends on the patient’s age, the severity of the problem, accompanying diseases, and adherence to the training program.