What defines 'adventitious' visual impairment?

Adventitious visual impairment is characterized by vision loss that occurs after the individual has experienced a typical level of vision. This type of impairment can result from various factors including accidents, injuries, or hereditary conditions that manifest later in life. It contrasts with conditions that are present from birth or develop gradually due to aging. Understanding this distinction is crucial for special education professionals, as it affects the approach to intervention and support for individuals experiencing such impairments. Recognizing that adventitious impairment can significantly impact a person's life, these professionals can tailor their strategies to assist individuals in coping with the sudden change in their visual capabilities.