Human anatomy and animal anatomy are somewhat similar but largely distinct from each other. There are things a human can do while there are skills those animals have mastered that are untouchable by humans. One of the huge differences in anatomy between humans and animals is their eyes. Do you know how does a dog see the world? And since we are on the topic let me tell you about how dog see the world and what dog see in general.
1. What is their Eye Anatomy?
The eyes of a dog are made up of the following parts.
- Conjunctiva is the lining of the eyelids. It gets red and swells up when your dog has allergies or an infection.
- The cornea is the thin front layer of the eye.
- Iris is the colored part of the eye. Like your dog has black or brown iris, the Alaskan malamute has gray-white, or aqua blue iris.
- The lens is just behind the iris, and it focuses on light to focus light on the retina.
- The pupil is the black area in the iris which dilates on the intensity of light or emotion.
- The retina is located behind the eyes and contains photoreceptors (rods and cones).
- The sclera is the white portion of the eye on which the pupil remains. (See Why do we have Eyebrows and Eyelashes?)
2. How is the Dog’s Eye Structure different from Humans?
Dogs have two distinct structures in their eyes which are not found in humans, namely the third eyelid and Tapetum lucidum. The former is the vertical white membrane inside their eyes and the latter provides them with better night vision. (See List of Names for Groups of Animals)
3. How many Eyelids do Dogs have?
To understand how dog see the world, keep reading about their whole eye structure. Dogs have three eyelids, upper, lower, and internal horizontal eyelid. You must have noticed a white membrane when the dog is sleeping with half-eyelid open. This membrane is known as a nictitating membrane or a haw. It has the following functions.
- Protects the eye from dust, physical contaminants, and other particles.
- Protects the cornea from getting scratched by outer particles.
- Keeps the eye moist. Also, check out how do fish sleep with their eyes open?
4. What is their Vision Level?
This characteristic is different in each breed but overall, as per experts, a dog has a 20/75 vision. (See Are Sand Dollars Rare?)
5. How Accurate can they see a Moving Object?
Dogs have a more accurate vision to locate a moving object; unlike humans, they can see it pretty clearly. Their motion sensitivity is 12 to 20 times better than humans. This is the reason you can train your dogs to respond to hand gestures, and they respond nicely. (See Bloodhound – Dog with Best Sense of Smell)
6. Do they only see Black and White?
No, they do not see a colorless world because they have cones and rods in their eyes just like humans. The only difference is that we have 3 cones (blue, green, and red) while dogs have only 2 rods. However, the exact colors they see are quite unclear, but experts say that they see more browns, greens, purples, and grays. (See What type of Consumer is a Rabbit?)
7. How Dog see the World with a Better Night Vision?
Dogs are hunters by nature and therefore their night vision is much better than that of humans. The presence of more rods in their eyes enables them to see with great clarity at night or in the dark. Also, they have Tapetum Lucidum, which is a reflective layer behind the retina that increases light sensitivity at night. (See What Symbolizes Bravery?)
8. What Dog see in the Dark?
They have some naturally gifted eye structures that make their vision better in the dark or dim light. The reasons why and how dog see the world mentioned below tell us about their ability to see in the dark.
- They have large pupils which allow more amount of light to enter when in darkness.
- Tapetum lucidum reflects light more accurately in the dark, making things clearer for them to see.
- They have more rods (photoreceptors).
- The lens is placed closer to the retina which makes the image visible to them bigger than the actual. (See 8 Types of Good Emotional Support Dogs)
9. What is their Field of Vision?
The range humans see with their eyes wide open is smaller than what dogs see. They have a wider vision because of the position of their skulls on their skulls which is the answer to how dog see the world so clearly. Their field of vision ranges between 240 degrees and 270 degrees, depending upon the breed. It enables them to see around them without moving their head. Must read about the 7 Facts About Dog Sled Teams.
10. What are LAOM and RAOL?
Now how dog see the world with their pupils extended? To answer that, take a look at laom and raol. According to the researchers, dogs have a set of muscles surrounding their eyes that help them project various emotions.
- The Levator Anguli Oculi Medialis (LAOM) muscle lifts the inner eyelid which gives them a baby-like appearance.
- The Retractor Anguli Oculi Lateralis (RAOL) muscle pulls the eyelids towards the ear which enlarges the appearance of their eyes. (See How to Pronounce Chihuahua?)
11. How do they Communicate with Eyes?
Puppy eyes are something no one can ignore. It is not just because they are cute but because they express themselves with their eyes and body language. The way they look at you tells you how they are feeling and what you should probably do. (See Personality & characteristics of people with brown eyes)
12. What if a Dog stares at you?
Dogs belong to the family of wolves that live in packs and staring is a sign of threat in their language. But dogs have learned to live with humans and have changed some of their habits, including staring. Their stare may be a sign of threat to other animals, dogs, or unknown humans. But for their owner, it can be a way of bonding. As per the study conducted in 2018, the researchers concluded that eye contact between a dog and his master increases the levels of Oxytocin in both. Must read do dogs feel emotion?
13. When does Staring become a Threat?
A prolonged staring can be a sign of stress or anxiety. And if your dog lacks socialism, a prolonged stare can mean a threat. This is another point if you want to understand how dog see the world. (See Why do Hermit Crabs need Shells?)
14. What is a Whale Eye?
The side-eye look that your dog gives is known as the whale eye. It may look funny, but it is a sign that your dog is uncomfortable with the situation, place, thing, etc. It is better to help them out.
15. What Eye Colors can a Dog have?
The color of the iris of a dog depends largely on its breed. Most dogs have brown-colored eyes, but some breeds are known to have multicolored eyes too. Like left eye is brown and right is blue. This combination is found in dogs with a Merle coat (mottled patches of color in a solid or piebald coat) or in particular species like Huskies or Australian Shepherds. (See What is the Largest Wolf?)
16. How does a Dog see the World with a White Iris?
There can be two factors behind the white iris. First, it is the color of their iris, or second, they have cataracts. You can see if they respond well to your hand gesture, if not, then it is surely not their eye color. A slight change in the color of their iris is an indication of a cataract. It is better to visit the vet. (See Why Are Dogs Not Supposed To Have Chocolate?)
17. Do Dogs have Myopia?
Dogs do not suffer from nearsightedness or farsightedness, generally. This situation, however, may occur with the age of a dog. According to experts, German shepherds, miniature Schnauzers, or Rottweilers are prone to nearsightedness at a young age too. Also, check out the article, Test To See If You need Glasses.
So, today you got to know about how dog see the world and what dog see. It is time to share how does a dog see the world with your friend and family with a dog member. (Also read How can you Tell If You have a Photographic Memory?)