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Dark spots in vision (or scotomas) are areas of reduced or absent sight within the visual field. These spots are fixed in location and are often described as patches of darkness, blur, or empty space that interfere with reading or seeing fine details.
read more about dark spots in vision ...The origin of fixed spots is damage to the light-sensitive tissues of the eye, specifically the retina or the optic nerve. A scotoma occurs when a group of photoreceptor cells or the corresponding nerve fibers fail to transmit visual information to the brain. The brain interprets this lack of signal as a blind spot. The location and size of the spot often help the doctor identify the specific damaged area in the retina.
The common causes of retinal damage that lead to fixed dark spots include Age-Related Macular Degeneration (AMD), where drusen and atrophy damage the macula, and retinal vein or artery occlusions (vascular blockages). In AMD, the spots are central, while vascular blockages can cause spots in the peripheral vision.
Dark spots severely affect daily function when they are central. A central scotoma makes reading, recognizing faces, and driving impossible because the spot covers the fovea, the area responsible for detailed sight. Even a small central spot can be debilitating.
Diagnosis requires a extensive exam. The doctor uses a visual field test (perimetry) to precisely map the size and location of the scotoma. Optical Coherence Tomography (OCT) is used to image the macula, confirming atrophy or fluid that is causing the retinal damage.
Management strategies focus on treating the underlying cause (e.g., anti-VEGF injections for wet AMD) and visual rehabilitation. Low-vision aids, such as magnifiers and specialized reading devices, are used to maximize remaining sight around the scotoma.
No, floaters move and drift. Dark spots (scotomas) are stationary and fixed in the visual field.
If the cause is treatable fluid (wet AMD) or swelling, the spot may resolve. If the cause is atrophy (dry AMD), the damage is permanent.
Dark spots are often detected in one eye first, but conditions like AMD can affect both eyes over time.
Fixed dark spots in your central vision are a sign of Macular Degeneration or a Retinal Vein Occlusion. If a spot appears suddenly, seek an eye exam. Doctors use an Amsler Grid to help you monitor these spots at home; any new "missing" areas on the grid require an immediate office visit.
AAO. Visual Field Defects (aao.org). 2024.
National Eye Institute. Macular Degeneration (nei.nih.gov). 2024.
Mayo Clinic. AMD Diagnosis (mayoclinic.org). 2024.
StatPearls. Central Scotoma (ncbi.nlm.nih.gov). 2024.