Visual pathway

The visual pathway is the anatomical and physiological system responsible for the transmission and processing of visual information from the retina to the brain (StatPearls, NBK534867). It begins at the retinal image plane, where light is focused by the eye's optical components and captured by photoreceptor cells (NIH NEI, How the Eyes Work). These photoreceptors convert light into neural signals that are processed by bipolar and ganglion cells before exiting the eye via the optic nerve (Wikipedia, Visual System). The pathway continues through the optic chiasm and the lateral geniculate nucleus of the thalamus, eventually reaching the primary visual cortex (StatPearls, NBK534867). While not a single molecular target, the visual pathway is the site of various pathologies, including glaucoma, age-related macular degeneration, and diabetic retinopathy (Mayo Clinic, Retinal Diseases). Therapeutic interventions target specific molecular actors within this pathway, such as vascular endothelial growth factor (VEGF) to treat wet AMD or prostaglandin receptors to manage intraocular pressure in glaucoma (AAO, Anti-VEGF Therapy). Advanced treatments like gene therapy target specific genetic defects in the retinal pigment epithelium to restore function within the pathway (FDA, Luxturna Approval). Monitoring the integrity of the visual pathway involves clinical tools such as optical coherence tomography (OCT) and visual field testing (PubMed, PMID: 28654238).

Other names

Visual systemRetinofugal pathwayOptic pathwayRetinal image plane

Therapeutic agents act on specific molecular components within the pathway, such as inhibiting VEGF to prevent neovascularization, lowering intraocular pressure via aqueous humor modulation, or utilizing gene therapy to replace defective proteins in the RPE65 cycle.