The human eye – its parts and why it is an evolutionary marvel?

You have probably wondered how our eyes work. The eye is an organ that can be compared to a camera. Visual stimuli pass through the cornea and the lens, stimulate the visual cells located in the retina and the image is formed.

Do you see how interesting our ocular machine is? Another example of its peculiarities is that people blink more when they are reading or concentrating on a task and less when they are relaxed or bored. Every time we blink it is because our vision is active, a complex moment of connection between our brain and our eyes.

Want to know more curiosities about the human eye? Join us to discover why it is an evolutionary wonder. We also share with you important information for the health and maintenance of our eyes and the best models of glasses from Optica Bassol to take care of them.

What is the human eye and what are its parts?

The eye is a very complex organ that allows us to see the world around us. When light enters the eye it passes through the cornea, the iris, the pupil and the lens. The lens focuses the light onto the retina. Cells in the retina convert the light into electrical signals that are sent to the brain through the optic nerve. The brain interprets these signals and creates the images we see.

The human eye is composed of several parts, including the eyelids, cornea, iris, pupil, lens, vitreous humor and retina. Let's take a look at the function of each of these parts of the eye:

The eyelids

The eyelids are two folds of skin that protect the eyes from light, dirt and other foreign objects. They help keep the eyes lubricated and moist. They are made up of skin, muscle and fat.

The skin of the eyelids is thin and delicate. The muscle of the eyelids is called the orbicularis muscle of the eyelids. This muscle is responsible for blinking. The fat in the eyelids helps keep the eyes lubricated and protected. The eyelids are very important for eye health, without them the eyes would be exposed.

The sclera

The sclera is the white, fibrous layer that covers most of the eyeball. It lies beneath the conjunctiva and above the choroid. It is responsible for protecting the eye from injury and maintaining its shape. It also helps blood circulate in the eye.

It is made up of connective tissue, which is a type of tissue that is strong and resilient. It contains a large number of blood vessels that help provide nutrients and oxygen to the eye. It is not transparent, so it does not allow light to pass through. It is made up of three layers:

• Episclera: this is the outermost layer of the sclera. It is made up of thin connective tissue and contains a large number of blood vessels.
• Scleral stroma is the middle layer of the sclera. It is made up of thicker connective tissue and contains a large amount of collagen fibers.
• Fuscating lamina: the innermost layer of the sclera. It is made up of denser connective tissue and contains a large number of blood vessels.

The cornea

The cornea is the transparent layer that covers the eye. It is located at the front of the eye and helps focus light. The cornea is made of connective tissue and has no blood vessels.

The crystalline lens

The lens is a kind of clear lens that lies behind the cornea. The lens helps focus light on the retina. It can change shape to focus light on objects near and far away.

Iris

The iris is the colored part of the eye. It is located behind the cornea and in front of the lens. It controls the amount of light that enters the eye. It has a muscle that contracts and dilates to open and close the pupil.

The pupil

The pupil is the black hole in the center of the iris. It opens and closes to control the amount of light entering the eye. When there is a lot of light, it closes to let less light in. In low light, it opens to let in more light.

The retina

The retina is a layer of light-sensitive tissue at the back of the eye. It contains photoreceptor cells that convert light into electrical signals. These electrical signals are sent to the brain through the optic nerve.

The retina contains cells called rods and cones:

• Rods are responsible for peripheral vision and night vision.
• Cones are responsible for central vision and color vision.

The optic nerve

The optic nerve is a cable that connects the eye to the brain. The optic nerve sends electrical signals from the retina to the brain. The brain interprets these electrical signals and allows us to see.

Aqueous humor

The aqueous humor is a fluid that lies between the cornea and the lens (anterior chamber). It helps maintain the shape of the eye and nourishes the cells of the lens and part of the cornea.

Vitreous humor

The vitreous humor is a gel found in the back of the eye. It helps maintain the shape of the eye and protect the retina.

How does the human eye work?

Visual cortex

The visual cortex is the part of the brain responsible for processing visual information. It is located at the back of the brain in the occipital region. The visual cortex is divided into two parts: the primary visual cortex and the secondary visual cortex.

The primary visual cortex is the most important part. It is responsible for processing basic visual information, such as shape, size and motion. The secondary visual cortex is responsible for processing more complex visual information, such as color, contrast and depth.

Human eyes are a marvel of evolution. They allow us to perceive in an incredibly detailed way. Without our eyes, we would not be able to live our lives in the same way.

Major studies on the human eye

Eyes are organs that have evolved over millions of years, from the simple eyes that early animals had to the complex eyes we have today. Take a look:

• Scientist Charles Darwin (1809-1882) was one of the first scientists to study the evolution of the eye. Darwin suggested that eyes evolved from simple structures that could only detect light and dark.
• Scientist George Wald (1906-1997), winner of the Nobel Prize for his work on the evolution of the eye, discovered that photoreceptor cells in the retina are specialized to detect different types of light.
• David Hubel (1926-2013), another Nobel Prize winner in physiology, for his work on the evolution of the visual cortex, discovered that the brain processes visual information in different specialized areas.

7 tips to take care of your eye health

Here are some of the habits you can follow to maintain good eye health:

1. Visit your ophthalmologist regularly: It's important to get regular eye exams, even if you don't have vision problems. This will help your ophthalmologist detect any problems in their early stages and recommend appropriate treatment.
2. Wear sunglasses with UV protection: The sun's UV rays can damage your eyes and increase your risk of developing cataracts and age-related macular degeneration. Wearing sunglasses with UV protection can help protect your eyes from this damage.
3. Eat a healthy diet: A healthy diet that includes plenty of fruits, vegetables and whole grains can help keep your eyes healthy. These vitamins and minerals are essential for eye health.
4. Avoid smoking: Smoking can damage your eyes and increase your risk of developing cataracts and age-related macular degeneration. If you want to maintain good eye health, it is best not to smoke.
5. Control your blood pressure: High blood pressure can damage your eyes and increase your risk of developing glaucoma. If you have high blood pressure, monitor your blood pressure regularly and take your medications as directed.
6. Avoid eye strain: If you spend many hours in front of a screen, take regular breaks. Look at a distant object for a couple of minutes every 20 minutes.
7. Avoid stress: Stress can increase the risk of developing eye problems such as glaucoma and cataracts. Find ways to reduce stress in your life, such as exercising, spending time outdoors or practicing relaxation techniques.

By following these recommendations, you can help protect your vision and keep your eyes healthy throughout your life.

Tips for choosing and wearing eyeglasses

Here are some considerations that will help you choose the glasses that are right for you:

• Choose glasses that fit your face well: glasses should cover your eyes completely and should not move when you blink.
• Choose glasses in a color you like and that help you see better: Dark lenses can help reduce glare and improve vision in bright conditions, and tinted glasses have different vision and protective qualities depending on the color.
• Clean your glasses regularly: Dirt and dust can reduce the effectiveness of the lenses.
• Consider the shape of your eyes: The shape of your eyes can influence the model of glasses you choose. For example, if you have round eyes, you may want to avoid round glasses, as they will make your eyes look even rounder. Instead, you can opt for rectangular or square glasses, which will help give the effect that the shape of your eyes and/or face is more elongated.

Eyeglasses models for your eye care

There are many models of glasses that are recommended to take care of your eyes from the sun. The most common ones are:

• Polarized: they block UV rays and reflected light, which can help reduce eye fatigue and headaches.
• Photochromic: They darken when exposed to sunlight, making them ideal for outdoor activities.
• UV filtered: They block UV rays, which can damage the eyes and increase the risk of developing cataracts and macular degeneration.
• With blue filter: They block blue light, which can be harmful to the eyes and contribute to eye fatigue.

When choosing glasses to protect your eyes, it is important to consider your personal activities and preferences, such as whether you play sports, spend a lot of time in front of the computer or a lot of time outdoors.

It is important to choose lenses with UV protection and polarized lenses. If you have vision problems, it is ideal to choose prescription sunglasses or anti-reflective prescription glasses.

How to choose a model of glasses that fits the shape of your eyes?

It is important to feel good with our glasses, whether they are sunglasses or prescription glasses. Our comfort and, ultimately, our visual health will depend on it.

Take into account the size of your eyes and the shape of your face when choosing a model of glasses to ensure your comfort when wearing them. For example, if you have small eyes, you may want to avoid glasses with large, dark frames. Instead, you can opt for glasses with smaller, delicate, light-colored frames.

Here are some suggestions for choosing glasses according to your eye characteristics:

If you have round eyes...

Choose rectangular or square glasses. Look at this model from Chanel: CHANEL Square sunglasses. This beautiful Chanel design is ideal for girls with round eyes, its frame is black and comes with polarized lenses. If you like to look glamorous and take care of your eyes, this model is for you.

If you like the color of your eyes...

You can choose any shape of glasses. Take a look at this Etnia Barcelona prescription glasses model: Etnia Barcelona KREUZBERG. This frame will make you look super young, fresh and on trend. They are a dream and they are at a 10% discount at Optica Bassol this summer, take advantage of it if you want to make your eye color stand out!

If you have slanted eyes...

[*14718980391235*]

Choose a pair of glasses with narrow frames. Enjoy this model: Gigi Studios GABRIELLA 6738/1 51. These sunglasses from the on-trend Spanish brand Gigi are ideal for you if you have slanted eyes. They will widen your look, as they are rounded, but narrow at the same time. Their price is crazy!

If you have bulging eyes...

Choose glasses with large frames and dark tones. Take a look at this Chanel model of prescription glasses: Chanel CH3448 C622 53. As you will notice, it is an elegant and trendy model. They come in black acetate, transparent and Havana color. Its large format and at the same time its delicate lines will soften your look, choose black or havana.

If you have small eyes...

Choose a pair of glasses with light-colored or open-rimmed frames. Enjoy this Love Moschino model: Love Moschino MOL579 7HH 53. With a wayfarer look, this model is divine. Your eyes will look rested and harmonious. Its transparency and light color will give freshness to your eyes. The best thing is its price!

Remember that these are just suggestions and that what matters most when choosing a pair of glasses is that you like them and that they make you feel good. If you are not sure which model of glasses suits you, Ópticas Bassol will know how to guide you to choose the model that best suits your eye type and face shape. Make an appointment and that's it!

Conclusion

Have you ever looked at the stars on a clear night? Or seen a rainbow while watering your garden? They are truly breathtaking and you can appreciate them thanks to your eyes.

The human eye is a complex organ that is made up of many different parts, which work together with our brain to help us enjoy the beauty of life.

And not only are they an evolutionary marvel, but they are also very necessary! So the next time you look someone in the eye, remember how amazing this organ is. And take a moment to appreciate and strive to maintain the vitality and health of your eyes.

Don't think twice and take advantage of the offers at Bassol Optics This summer, with free shipping and a 24-month guarantee, your eyes will thank you!