Are there any patents related to red-eye reduction technology

Apr 24, 2025 ... Essentially, when the flash from a camera hits your eyes, especially the retina where there's a dense network of blood vessels, that light ... What Causes Camera Red Eye? ... The red eye effect in pictures occurs when the light rays from your camera's flash reflect back off the subject's retina and into ... Since these layers have a lot of vessels supplying blood, the reflected light has a reddish – orange hue called the red reflex. This red reflex is a good ... Apr 9, 2018 ... Red-eye effect tends to happen especially when you use a flash in low-light conditions. The low light causes the pupils to dilate. When the ... Mar 19, 2025 ... What causes red eyes in photographs? The “red-eye” effect happens when a camera flash reflects off the back of the eye, where tiny blood ... Mar 6, 2024 ... What Causes Red Eyes in Photos. In low-light conditions, the pupil of the eye dilates adapting to the dim lighting, so that more light can enter ... Apr 1, 2024 ... Close-up of a man's red bloodshot eyes. hadkhanong_Thailand/iStock via Getty Images. A red eye might look scary and cause discomfort. But the ... Jul 9, 2024 ... "Overwhelmingly, the most common cause of an abnormal red reflex is refractive error," said Dr. Michael Repka, MD, Johns Hopkins Hospital. A ... If the angle of reflection is less than 2.5 degree, red eye will occur. See the figure below. One way to overcome the red-eye effect is to move closer to your ... Aug 22, 2022 ... What causes the familiar 'red eye' on photographs? 'Red eye' results from scattering of light from the back of the eye (the retina). In such ...