| | Conditions & Treatments | Eye & Vision Disorders What does it mean when a person can only see in 2D? Humans cannot only see in 2D. We have two eyes that give us depth perception, which is the ability to see objects in three dimensions. Eye & Vision Disorders - Related Articles How to Apply a Contact Lens Optic Neuropathy Symptoms Guide Dogs for Senior Citizens in Georgia How to Tell if you are Color Blind How to Order Eyeglasses Online How to Do the Wideout Exercise Can you lose sight wearing colored contact lenses?