Portable Design: Light weight and in small size, can be put into the glasses case, easy to store and carry, suitable for home and professional eye hospital. Wide Range Of Applications: Red green glasses is mainly used for binocular vision function training such as fusions, stereo, disinhibition, etc. Eye Training: Great tool for home vision treatment, helping children or adults with reading problems reduce reading frustration, simple and reliable. Great Material: Eye training glasses is made of excellent material, safe and eco friendly, firm and sturdy, not easy to deform, stable and durable for use. Disinhibition Effect: Helps people with lazy eye and intermittent exotropia reduce inhibition, balance the function of your two eyes, practical for use.