Tunnel Vision: How Narrow Focus Shapes Your Reality
Introduction and Definition of Tunnel Vision Tunnel vision, clinically known as tubular vision, describes a profound visual field defect characterized by the severe constriction of peripheral sight, resulting in the perception that the world is viewed through a narrow tube, funnel, or long tunnel. This condition is defined by a significant reduction in the visual […]
Retinitis Pigmentosa: The Psychology of Sight Loss
Retinitis Pigmentosa: A Comprehensive Encyclopedia Entry Introduction: The Core Definition Retinitis Pigmentosa (RP) represents a group of rare, inherited degenerative retinal disorders that progressively impair the photoreceptor cells in the eye, which are responsible for detecting light. This condition is characterized by a gradual loss of vision, typically commencing with difficulty seeing in low light […]
ELECTRORETINOGRAM (ERG)
Introduction Electroretinogram (ERG) is an objective method for measuring electrical activity in the retina in response to light. It is a non-invasive procedure which is used to measure the functioning of the rod and cone photoreceptors in the retina. The technique has been used in the diagnosis and management of a variety of retinal diseases, […]