A sudden increase in small black spots in your vision, often described as "floaters," along with flashes of light or a dark curtain slowly covering part of your visual field, may signal a serious eye condition known as retinal detachment. These symptoms are called myodesopsias, which are usually harmless when they occur occasionally. However, a rapid multiplication of these spots can be a warning sign of a more severe issue. In France, around 15,000 people are affected by retinal detachment each year, which translates to about one in 10,000 individuals. This condition is more common in people over the age of 50 and those with high myopia, a history of retinal detachment, a past cataract surgery, or a history of eye injuries. Three key symptoms—sudden increases in floaters, flashes of light that resemble sparks, and a dark veil or curtain slowly moving across part of the visual field—should raise concern about retinal detachment. These symptoms are usually not painful, which may lead some people to dismiss them as fatigue or stress. However, retinal detachment is a medical emergency that requires immediate attention. If retinal detachment is diagnosed, surgery must be performed within 24 to 48 hours to maximize the chances of preserving vision. The retina functions like a photographic film at the back of the eye. When it detaches, it loses its supply of oxygen and nutrients, leading to the rapid breakdown of the photoreceptor cells that are essential for vision. If treatment is delayed, this damage can become permanent. If you experience sudden visual symptoms, it is crucial to see an ophthalmologist as soon as possible. If an appointment cannot be made immediately, hospitals offering emergency eye care can examine the back of the eye and provide a precise diagnosis. It is helpful to note the exact time the symptoms started, whether the number of floaters continues to increase, and if part of your vision feels veiled or impaired. Prompt medical attention is essential to prevent potential long-term vision loss.