The Most Common vision problems are reflective errors, more commonly known as nearsightedness, farsightedness, astigmatism and presbyopia.
Low vision is a visual impairment, not correctable by standard glasses, contact lenses, medicine, or surgery, that interferes with a person's ability to perform everyday activities.
Refraction is the bending of light as it passes through one object to another. Vision occurs when light rays are bent (refracted) as they pass through the cornea and the lens.
Glaucoma Cataract, Keratitis, Allergic Conjunctivitis, Sclerits, Iritis, Pterygium, Chazion, Pinkeys, Diabetic Retinopathy, Caratoconus.