Low vision is insufficient vision,despite wearing the best possible corrective lenses or in other words,to be unable to do the things one want to do. According to WHO- A person with low vision is one who has impairment of visual functioning even after: treatment, for example an operation and/or standard refractive correction(has been given glasses or lenses)and has a visual acuity of less than 6/18 to light perception, or a visual field of less than 10 from the point of fixation(I.e.20 across) but who uses, or is potentially able to use, vision for the planning and/or execution(doing it)of a task.[1]