
Understanding Visual Impairment
Visual impairment is classed as a limitation of one or more of the functions of the eye or visual system that inhibits vision or visual field and acuity, and cannot be corrected with standard glasses or contact lenses. Within this definition, people can be registered as either sight impaired, which was previously known as “partially sighted”, or severely sight impaired, which was previously termed “Blind”.
Even with these two specific terms, the classification of visual impairment remains extremely broad as sight loss is something that can be experienced in radically different ways from one individual to the next.
Moreover, there are many causes of sight loss. The leading conditions include-related macular degeneration, glaucoma, cataract and diabetic retinopathy, which are eye-specific ailments. Beyond these, vision can be impaired by other conditions that are not directly associated with the eye itself and instead lead to neurological damage. These disorders include stroke, motor neurone disease and Parkinson’s disease.