“The cane is used to check for objects in a person’s path, changes in the walking surface (from cement to grass, for example) and to check for dangers like steps and curbs.” Instead of looking down all the time at one’s feet, a white cane allows one to use their vision to look ahead and around them. Canadian National Institute for the Blind provides this explanation: Training in the use of a white cane by a certified orientation and mobility instructor provides safer navigation, more mobility and increased confidence. If there are stairs inside the home they should be lighted or have lots of light around them. The color contrast allows one to identify and navigate steps. monocular cue: cue that requires only one eye. linear perspective: perceive depth in an image when two parallel lines seem to converge. These are typically classified into binocular cues that are based on the receipt of sensory information in three dimensions from both eyes and monocular cues that can be represented in just two dimensions and observed with just one eye. depth perception: ability to perceive depth. Outdoor stairs can be marked with bright yellow strips of tape. Depth perception arises from a variety of depth cues. Some states allow people with low vision to drive with the use of bioptic lenses. These glasses have a miniature telescope mounted on one or both of the eyeglass lenses. Make an appointment with a low vision optometrist to be evaluated for bioptic lenses. While this vision loss can’t be completely overcome there are some strategies and vision aids one can use to help compensate. So even if you have one good eye, depth perception is decreased. Two healthy functioning eyes working together are required for good depth perception. Loss of depth perception is reduced when there is loss of visual contrast. Not only does declining depth perception lead to frustration and anger, but these patients are at a high risk for falls and accidents. ![]() The inability to distinguish the curb from the sidewalkĭifficulty navigating stairs or missing a stepĭetermining how much water to pour into a glass or coffee in a cup The inability to distinguish how far away an object is making driving unsafe It can affect one’s life in many different ways such as : One of those vision losses is the loss of depth perception or the ability to perceive distance. ![]() But there are other changes that can also affect one’s quality of life and ability to navigate in and outside of the home. This vision loss affects one’s ability to read or to recognize a familiar face. When someone has been diagnosed with macular degeneration the most common symptom that comes to mind is the loss of straight ahead or the center part of one’s vision.
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