Adapting to Monocular Eyesight



Continuing with Monocular Vision Monocular vision is a condition in which one eye is blind, or one eye is unable to register images in coordination with the other eye. There are a number of common obstacles that are associated with this type of impaired vision. The most common is the inability to determine the depth of objects that are close to a person, typically within three feet. This loss in proximate (close-up) depth perception is due to the loss of an important binocular depth cue, stereopsis. Stereopsis is the most acute kind of depth perception, characterized by three-dimensional vision. People living with monocular vision must rely on the summation of nine weaker depth perception cues: accommodation, linear perspective, interposition, texture gradient, relative size, light and shadow, relative brightness, aerial perspective, and motion parallax. The definition of each depth perception cue is listed below for reference. You have a reduced field of vision and your ability to judge distance is impaired.



01. Technolgy meets design



Peripheral Vision With only the one eye you have lost approximately 20% of your peripheral vision. You can test this by holding your arms out to the side and bringing them in until you can see your hand. *While this is not a significant part of his field of vision there are adjustments you will have to make. It will create many minor embarrassing and frustrating situations. It is most noticeable in crowded areas where you will bump into people on his blind side. Many people have told me that they will try to walk with a partner or a wall on the blindside to prevent this problem. You will also have people approaching him on the blindside and accuse you of being rude because he will not acknowledge them. This is particularly apparent when you are sitting at a table and are required to turn his back on the person on one side when addressing the person on his other side.


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Depth knowledge


Depth knowledge

With the loss of his binocular vision you not going to be able to judge distances as well as you used to. This poses challenges to everyday things such as pouring a drink or shaking hands.


He will need to be more careful with driving and ball sports will be challenging as it is more difficult to track a moving object.


Coming to Feast Arrive Early If you are the first to the table, you can take a seat at the end of the table where it is easy to see everyone without must to turn your head. Eating Becomes Easier Eating at first will feel a bit tricky as your fork and your glass will be in slightly various places from where you think they are.


Take things slowly and tell yourself that you will very soon get used to where everything is.


Develop a Good Pick Up Line



Develop a Good Pick Up Line

You will experience a little difficulty judging distance properly. This can lead to knocking things over when you reach for them. Develop a habit of reaching out for things and stop before you can touch it. This is your pickup line. Move your hand the last little distance very slowly. Rest Easy with Pouring With monocular vision pouring liquids can be a bit hazardous at first. The trick here is to very slowly place the lip of the bottle directly on the rim of the cup or glass. Careful Near the Oven Wearing gloves near the stove will help protect you from burns as you get used to where things are and how you need to adjust for your new view on the world. Going Out & About Get Some Attitude If you are standing directly over a container when pouring it may be difficult to accurately judge when how full it is. By standing slightly back you’ll be able to see more of the container and gain an accurate assessment of how full it is.



Shadows Need Perspective



Shadows Need Perspective

Too Shadows cast by objects illuminated by artificial light at night will appear to be a part of an overall object. Again, standing at a different angle will help here as well. Beware the Mirror Warning Dim lighting is a challenge. Large mirrors in dim lighting can appear to be an extension of the room. In these situations, there is a risk of walking straight into mirrors. Avoid Falls on Stairs and Gutters Looking down on stairs and gutters gives a false message of depth. Make a mental note to take care when walking downstairs. Use the handrail to give yourself extra support. Make sure you take notice of the last step. Negotiate gutters carefully. To avoid a fall, slow right down, look at the gutter as you approach so your brain can work out the drop from several angles as you approach. After a while, your brain will perform a lot of these tasks automatically.