What Is Monocular Vision

Monocular vision is a condition in which only one eye is working, causing reduced peripheral (side) vision and having difficulty determining distance. People with monocular vision can also have difficulty with depth perception, which requires both eyes working together to create an image that can be processed by the brain into three dimensions.

We usually use both eyes to see and then our brain combines the information from both eyes, however in some cases we can only use one eye and therefore are using monocular vision.

What Is Monocular Vision

Monocular vision is the use of one eye only. We usually use both eyes to see and then our brain combines the information from both eyes, however in some cases we can only use one eye and therefore are using monocular vision.

Monocular vision can be a result of a problem with the eye itself or it can be caused by other conditions that lead to blindness in one eye. In some cases, monocular vision is used as an aid to help with tasks such as reading or sewing.

With monocular vision

With monocular vision, you will experience a loss of depth perception and your field of vision may be cut in half, however you will still be able to see. Here are some things to keep in mind if you are experiencing monocular vision:

  • You can’t see well at night. When it’s dark, your brain doesn’t register the images from one eye as well as it does when both eyes are working together. This means that objects outside of your direct line-of-sight (such as street signs) may not appear clearly enough for you to read them or recognize them easily.
  • You can’t see well in the distance – because only one eye is receiving visual information, objects that are far away appear blurry or out of focus (this is why people with binocular vision have trouble reading road signs when they’re driving).
  • You can’t see well in the fog – because only one eye is receiving visual information and there’s almost no depth perception without binocular vision!

Visual processing

Binocular vision is a type of visual perception that occurs in humans, animals and several other animal species. It consists of two eyes working together to provide depth perception (colloquially known as “3D vision”) and the ability to see in stereo, but at the cost of being able to focus on only one object at a time. Binocular vision provides an image with a very wide field of view and can be considered “the normal way” in which humans see. Monocular vision refers to any method of seeing by means of only one eye. Monocular sight is not as clear or sharp as binocular sight; objects appear blurred and out-of-focus when viewed monocularly (as compared to those same objects seen through both eyes).

Binocular vision creates depth perception, allowing a person to determine how far away an object is.

When we look at an object straight on, our two eyes see slightly different images of the object. The brain uses this difference to determine how far away the object is.

For instance, when you’re driving a car and there’s a tree in your way, one eye may see it as too close while the other sees it as too far. This difference helps your brain determine that there’s something blocking your path—and then react accordingly.

This ability to create depth perception allows us to do many things more easily and safely than we would be able to otherwise: drive cars safely, play sports competitively (think golf), participate in dance competitions—even just interact socially with others! And while some people do lose binocular vision due to injury or disease or even wear glasses or contacts that don’t correct their vision properly, most people can maintain good binocular vision throughout their lives if they know how important it is for these fundamental tasks as well as for art and design work involving three-dimensional objects (like painting landscapes).

Monocular vision

Monocular vision does not have this advantage and is more limited because it only uses one eye for seeing. Monocular vision has reduced peripheral vision, which means that the person with monocular vision has blind spots outside of their central line of sight. They will be able to see what is directly in front of them but they will not be able to see anything coming from the sides or behind them because they have no peripheral vision in these areas.

This lack of depth perception can make it difficult for someone who only uses one eye to judge distances accurately and therefore may find certain tasks challenging such as catching a ball or driving a car. Also, monocular vision cannot be corrected by wearing glasses or contact lenses like binocular vision can; therefore if you are born with monocularity then that’s how it’ll stay throughout life.

People with monocular vision

People with monocular vision have difficulty with depth perception and reduced peripheral (side) vision. This is because the brain relies on both eyes to determine an object’s distance from you, so you may find yourself bumping into things or tripping over your own feet.

Monocular vision is a problem for people who need to judge depth, such as a pilot landing a plane at night or someone driving at night. They also have problems seeing objects in the periphery, which can make it difficult for them to drive safely behind other vehicles if they don’t know where they are heading. Monocular vision can also be problematic for people who need accurate distance information to perform tasks like cooking or sewing—many monocular-visioned individuals can’t tell whether something is too close or too far away until they touch it!

Having monocular vision

Having monocular vision means having reduced visibility from only using one eye. This is the opposite of binocular vision, where you use both eyes to see. Monocular vision can be caused by many different things, such as an illness or injury, but the most common cause is strabismus—an eye condition that causes one eye to turn inwards or outwards.

Monocular vision limits your ability to see depth and movement because it uses just one eye instead of two. While this may seem like a minor inconvenience at first glance, it can actually have serious consequences if not treated properly by an optometrist or ophthalmologist (eye doctor).

There are many causes for monocular vision including: Blockage of one eye’s view due to congenital cataracts or a droopy eyelid (ptosis), certain types of brain damage and certain types of glaucoma.

  • Congenital cataracts can cause the vision in one eye to be partially or completely blocked. The condition can be corrected with surgery and is usually treated early in life.
  • Droopy eyelids, also known as ptosis, may cause the pupil of one eye to be covered by an eyelid when it should not be covered. This condition can be corrected with surgery or through the use of Botox injections into the muscles that control eyelid movement. A droopy eyelid often results from aging-related muscle deterioration, so it’s more common in older adults.
  • Brain damage and glaucoma are both conditions that affect how your brain processes visual information from eyesight. In both cases, there are symptoms such as blurred vision and loss of peripheral vision (the ability to see what’s happening on either side of you) that indicate that something is wrong with your eyesight—something called monocular vision—or brain function itself has been affected by these conditions instead

Takeaway: Monocular vision is the use of one eye only.

  • Monocular vision is the use of one eye only.
  • It’s used in cases of brain damage or glaucoma.
  • It can also be caused by congenital cataracts or a droopy eyelid.

See also: Night Vision Monocular For Hunting Deer, Best Night Vision Monoculars, Monoculars For Stargazing, Monoculars For Long Distance, Best Monoculars For Hiking & Backpacking


Monocular vision can be a challenging condition to live with, but there are ways to help people with monocular vision see better and have more depth perception. A person may need glasses or contact lenses in order to improve their peripheral (side) vision or have an eye patch over one eye so that each eye can work separately.

We have talked about what monocular vision is and how it works. Now that you know more about this topic, you can better understand what it means if you or someone else has monocular vision.

Matthew Koch

Hi, I'm Matthew, a passionate blogger and traveler. I'm also a hard-core hiker. Hiking with friends and visiting new places is what I live for. Currently, I'm working at Gear Odds as CEO & Columnist. I would like to provide my best outdoor experience possible.

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