Netthinde

Netthinde is a Norwegian term that is sometimes used to denote the retina, the light-sensitive layer at the back of the eye. The standard Norwegian term for this structure is netthinne. The retina contains photoreceptor cells—rods, which support vision in low light, and cones, which mediate color and high-acuity vision—which convert light into electrical signals. These signals are processed by retinal neurons and transmitted via the optic nerve to the brain, where they are interpreted as visual information.

The retina lines the inner surface of the eye between the vitreous body and the choroid, and it comprises several layers, including the photoreceptor layer, outer and inner nuclear layers, outer and inner plexiform layers, and the ganglion cell layer with the nerve fiber layer. The macula, and its central fovea, provide high-acuity central vision.

The inner retina is supplied by the central retinal artery, while the outer retina receives nutrients from the choroid. The retina arises from the neural tube and is considered part of the central nervous system.

The retina can be affected by conditions such as retinal detachment, age-related macular degeneration, diabetic retinopathy, and inherited dystrophies like retinitis pigmentosa. Diagnostic tools include ophthalmoscopy, optical coherence tomography (OCT), fluorescein angiography, and electroretinography (ERG).

Treatment and management depend on the condition and may include laser therapy, anti-VEGF injections, corticosteroids, vitrectomy, or other surgical interventions, along with control of systemic diseases and risk factors.

Netthinne is the standard term in Norwegian medical usage; netthinde is uncommon and may reflect misspelling or regional variation.