Virtual reality, augmented reality and mixed reality all put digital images in front of your eyes, but they handle your view in different ways. VR hides the room and shows a computer-made scene. AR keeps the room visible and adds digital objects to it. Mixed reality, often shortened to MR, describes headsets that can do either, and that can keep virtual objects in place on real tables and walls.
Augmented reality (AR) leaves the real world in view and adds graphics on top of it. A common example is a phone camera that shows a sofa placed in your living room. AR glasses work differently: light from the room passes through transparent lenses, and small projectors add images to that light.
Mixed reality (MR) is a term for headsets that can blend the two. Many MR headsets have cameras on the front that film the room and show it to you in colour, and they can place virtual objects that stay put as you walk around. The label is used loosely, so check how a headset shows the room rather than relying on the name.
Each approach has trade-offs. Passthrough can add a short delay, and the image may look softer or grainier than your own eyes, especially in dim light. Optical see-through glasses show the real world directly, so it looks natural. Their digital images, however, are often dimmer and cover a smaller area than a VR screen does.
AR goes further into the room. The device maps surfaces such as floors, tables and walls, then keeps track of its own position inside that map. This is called simultaneous localisation and mapping, and it is why a virtual lamp can stay in one corner while you walk around it. Phones do the same job with frameworks such as ARKit and ARCore.
Tracking depends on conditions. Dim rooms, plain white walls and glossy surfaces give the device few features to follow, so virtual objects can drift. If an object slides, turn on more light and look slowly around the room so the device can re-read its surroundings.
AR suits tasks where the digital content relates to the place you are standing in: navigation arrows on a street, a furniture or paint preview in your home, step-by-step repair instructions pinned to a machine, or measurements that appear next to real objects.
Mixed reality covers both kinds of work. A design team might walk around a full-size model of a room, or a student might assemble virtual parts on a real table while still seeing the people in the room.
AR glasses look close to ordinary eyewear, with thin lenses and a compact processor, sometimes in a separate pack. They are lighter, but their display is smaller and the battery is usually shorter.
Headsets give a wide view and strong immersion.
Headsets are heavier, more conspicuous and need more space to set up.
Glasses are light and look like everyday eyewear, which suits short tasks.
Glasses have a smaller image area and shorter battery life.
Safety starts with the room. A VR headset blocks your view, so clear the floor, move cables and sharp furniture corners out of the way, and keep a chair nearby if you plan to sit. AR glasses leave the room visible, but a display in front of your eyes still takes attention. Do not use AR glasses while crossing a road or driving.
If you feel dizzy or nauseous, or get headaches or eye strain, take the headset off and rest. Persistent symptoms need a doctor's advice, because a headset cannot tell you whether anything is wrong with your health. Check the age guidance from the maker before a child uses one.
What each term means
Virtual reality (VR) places you inside a fully digital environment. A VR headset has a small screen for each eye and lenses that focus those screens across a wide field of view. When you turn your head, the image follows, so the scene seems to surround you. Nothing from the real room appears in the picture, which is why you need clear space around you.Augmented reality (AR) leaves the real world in view and adds graphics on top of it. A common example is a phone camera that shows a sofa placed in your living room. AR glasses work differently: light from the room passes through transparent lenses, and small projectors add images to that light.
Mixed reality (MR) is a term for headsets that can blend the two. Many MR headsets have cameras on the front that film the room and show it to you in colour, and they can place virtual objects that stay put as you walk around. The label is used loosely, so check how a headset shows the room rather than relying on the name.
What the display shows
The biggest practical difference is what happens to your view. A VR headset is opaque: its screens cover your eyes completely. AR glasses are see-through: you look at the room, and the graphics appear over it. Many mixed reality headsets use video passthrough, where the front cameras capture the room, the headset shows that live feed on opaque screens, and virtual objects are added to the picture. Through the headset, the room looks like live video rather than like looking through glass.Each approach has trade-offs. Passthrough can add a short delay, and the image may look softer or grainier than your own eyes, especially in dim light. Optical see-through glasses show the real world directly, so it looks natural. Their digital images, however, are often dimmer and cover a smaller area than a VR screen does.
How each one tracks your space
Every type has to know where your head and hands are, and where the room is. Many current VR headsets use inside-out tracking: cameras and motion sensors on the headset follow its position without external sensors mounted on a wall. Many of them ask you to set up a play area, and the headset warns you when you move close to its edge.AR goes further into the room. The device maps surfaces such as floors, tables and walls, then keeps track of its own position inside that map. This is called simultaneous localisation and mapping, and it is why a virtual lamp can stay in one corner while you walk around it. Phones do the same job with frameworks such as ARKit and ARCore.
Tracking depends on conditions. Dim rooms, plain white walls and glossy surfaces give the device few features to follow, so virtual objects can drift. If an object slides, turn on more light and look slowly around the room so the device can re-read its surroundings.
Typical uses
VR suits situations where you want to be absorbed: games, films shown on a large virtual screen, flight or driving simulators, and training that needs a realistic scene without distractions. It is also popular for fitness, where your whole body moves inside the scene.AR suits tasks where the digital content relates to the place you are standing in: navigation arrows on a street, a furniture or paint preview in your home, step-by-step repair instructions pinned to a machine, or measurements that appear next to real objects.
Mixed reality covers both kinds of work. A design team might walk around a full-size model of a room, or a student might assemble virtual parts on a real table while still seeing the people in the room.
Hardware shapes: headset or glasses
VR and mixed reality usually come as headsets: a front shell with lenses and cameras, a strap around the head, and a battery and processor either inside or in a separate pack. The weight sits on your face and head, so long sessions can become tiring.AR glasses look close to ordinary eyewear, with thin lenses and a compact processor, sometimes in a separate pack. They are lighter, but their display is smaller and the battery is usually shorter.
Headsets give a wide view and strong immersion.
Headsets are heavier, more conspicuous and need more space to set up.
Glasses are light and look like everyday eyewear, which suits short tasks.
Glasses have a smaller image area and shorter battery life.
Comfort and safety
Comfort depends on how your brain reads movement. In VR your eyes can report motion that your inner ear does not feel, which causes motion sickness for some people. Moving by teleporting instead of walking smoothly tends to reduce that conflict, and motion sickness in VR covers the common remedies. AR glasses keep your real surroundings in view, so the conflict is usually smaller, but they can strain your eyes when the digital image seems to sit at a different distance from the room. Passthrough lag can also cause a swimmy feeling for some people.Safety starts with the room. A VR headset blocks your view, so clear the floor, move cables and sharp furniture corners out of the way, and keep a chair nearby if you plan to sit. AR glasses leave the room visible, but a display in front of your eyes still takes attention. Do not use AR glasses while crossing a road or driving.
If you feel dizzy or nauseous, or get headaches or eye strain, take the headset off and rest. Persistent symptoms need a doctor's advice, because a headset cannot tell you whether anything is wrong with your health. Check the age guidance from the maker before a child uses one.
Which one fits your goal
Start from the job you want the device to do, not from the category name.- Choose VR if you want games, immersive films or simulations, and you have a clear space to move around in.
- Choose AR if you want information layered onto the real world, such as directions or previews, and you want to stay aware of your surroundings.
- Choose mixed reality if you need both, such as placing virtual objects in your room while still seeing real people and furniture.
| Feature | VR | AR | Mixed reality |
|---|---|---|---|
| What you see | Digital scene only | Real room with graphics added | Room shown by cameras or seen through lenses, with graphics added |
| Typical hardware | Headset | Phone, glasses or headset | Headset |
| Room tracking | Play area, boundary based | Surface mapping and anchoring | Full room mapping |
| Common uses | Games, films, training, fitness | Navigation, previews, guidance | Design review, training, collaborative work |
| Main drawback | Needs space, can cause motion sickness | Smaller and dimmer display | Heavier, passthrough can look soft |