Definition:

Blind Sight

Description:

Blind sight refers to a phenomenon where individuals with certain types of visual impairments can still respond to visual stimuli without any conscious visual awareness or perception.

Subtypes:

• Cortical Blind Sight
• Blind Sight due to Damage in the Optic Nerve
• Blind Sight due to Damage in the Retina

Cortical Blind Sight:

Cortical blind sight occurs when a person has a lesion in the primary visual cortex of the brain, rendering them unable to consciously process visual information. However, they can still respond to visual stimuli in certain ways, such as accurately locating the position or motion of an object.

Blind Sight due to Damage in the Optic Nerve:

Blind sight caused by damage in the optic nerve involves the inability to transmit visual information from the eye to the brain because of optic nerve damage. Despite the lack of conscious visual perception, individuals can demonstrate unconscious visual abilities, such as being able to successfully navigate obstacles.

Blind Sight due to Damage in the Retina:

Blind sight resulting from damage in the retina refers to situations where the retina is damaged, preventing the formation of a clear visual image. Nevertheless, individuals may still exhibit certain visual capabilities unknowingly, including distinguishing between light and darkness or detecting the presence of motion within their blind field.