The eye is shaped like a circular ball with a slight bulge at the front, and it consists of three main layers; It is the outer layer of the eyeball, which is a hard, dark white membrane called the sclera or the white of the eye, which contains a slight swelling in the front part of the eye, which is a thin dome-shaped tissue called the cornea, and the middle layer is known as the choroid, and the front part of it is known as the part The eye is stained by the iris, which contains a circular hole or opening in the middle of it known as the pupil, and the inner layer of the eye is made of the retina . 
Vision is accomplished by transmitting light through the front of the eye known as the cornea to the lens, where both help focus the light rays on the back of the eye known as the retina K, which contains cells that absorb and convert light into electrochemical impulses that are transmitted along the optic nerve and then to the brain. 
Preserving the eye with herbs
In fact, it is not possible to put any type of herbs directly inside the eye, since the preparations that are placed in the eye must be sterile just as is the case in the preparations that are given by intravenous injection, and the pharmaceutical preparations intended for use in the eye more than once must It should contain a preservative for fear of exposing the eye to infection, and it is worth saying that there are other conditions that must be met in the preparations that must be placed on the eye, including the pH of the solution intended for use on the eye, and the optimum pH of eye preparations is the pH of 7.4, in addition The chemical formula of the active ingredient, and the solvent of the active substance, which must be prepared with great care so that it does not affect the stability and stability of the active substance, and does not harm the eyes, and the viscosity-enhancing substances are eye drops, which help control the stay of the drop in the eye and control its flow. 
Put the tea bags over the eye
Putting tea bags on the eyelids is one of the famous home remedies, as tea bags may help improve the appearance of the eyes by reducing swelling and redness in the eyelids, and tea bags can be used by boiling and cooling two tea bags, getting rid of excess liquid, and putting the bags on the eyes Closed for 15-30 minutes, and it is recommended to use the fingertips to apply gentle pressure on the eyes or gently massage the area around the eyes, and the bags can be covered with slices of cold cucumber for more comfort, and it can be said that there are several types of tea that can be used, including Black, white, green tea, and many other types of herbal teas such as: sage, chamomile, lavender, hardened sage or hardened sage, calendula known as calendula, comfrey, fennel and fenugreek. 
Eye herbal pharmaceutical preparations
Eyebright is one of the herbal preparations used to treat eye irritation, as it contains many beneficial compounds for eye health, such as: flavonoids and Quercetin, and it is worth noting that there are several pharmaceutical preparations available from this herb, including: Liquid, capsules, and eye drops , but it should be said that none of the doses of these preparations have been tested in human studies, and therefore it is really recommended not to depend on herbs to treat the eyes or maintain their health. Given that the eye is a very important and sensitive organ, and any preparations that may not be safe and even dangerous if placed in the eye should not be used. 
Herbs that promote eye health
We will mention some herbs that may be helpful in supporting eye health, including the following: 
- Fennel: used the herb fennel by eating tea fennel, where fennel contains nutrients such as materials: vitamins A and C; They are an antioxidant nutrient that helps prevent macular degeneration and can help slow and worsen cataracts.
- Blueberry: This plant is useful in improving night vision, as the nutritional supplements made from it help to see more clearly for those who have difficulty driving at night.
Eye diseases and problems
The eye may be affected by many diseases, and we will mention some of them as follows:  
- Age-related macular degeneration (AMD), a disease associated with aging, that destroys the acute central vision necessary to see things clearly, and gradually do common daily tasks such as: reading and driving.
- Cataract: , also known as cataract , which causes blurred or cloudy vision, and colors may appear faded.
- Diabetic eye disease: It is a complication of diabetes and a major cause of blindness. The most common form of it is diabetic retinopathy, which occurs due to damage to the small blood vessels inside the retina.
- Glaucoma: , also known as glaucoma ; It is a group of diseases that can damage the optic nerve of the eye, lead to vision loss and blindness , and it is usually associated with high pressure in the eye and affects side or peripheral vision.
- Dry eye: Dry eye occurs when the eye does not produce tears properly, or when the tears are not sticky and evaporate very quickly, and dry eyes may result from performing some activities such as: using the computer or reading for a long period of time with greater difficulty.
- Amblyopia: The amblyopia , which is also referred to as the lazy eye, the most common cause of visual impairment in children, occurs when amblyopia is reduced vision in one eye; Because the eye and the brain do not function properly, it is worth noting that the eye affected by amblyopia may appear normal, but it is not used normally. Because the brain prefers the other eye, and if amblyopia is not successfully treated in early childhood, it may continue into adulthood , and amblyopia affects approximately 2-3% of the population around the world.
- Squint: , strabismus occurs due to an imbalance in the position of the eyes and the coordination between them, where the eyes move in different directions, and do not focus simultaneously on one point, which causes the absence of deep perception of the image, causing the brain to ignore the input from one eye, which causes loss Permanent sight is in that eye.
- ↑ "Eye Anatomy and Function" , www.uofmhealth.org , Retrieved 1-6-2019. Edited.
- ↑ "Anatomy of the Eye" , www.umkelloggeye.org , Retrieved 1-6-2019. Edited.
- ↑ "Topical drug dosage forms for eye conditions" , www.pharmaceutical-journal.com , Retrieved 1-6-2019. Edited.
- ↑ "How to Use Tea Bags for the Eyes" , www.healthline.com , Retrieved 1-6-2019. Edited.
- ↑ "Do Eyebright Drops and Supplements Benefit Health" , www.healthline.com , Retrieved 1-6-2019. Edited.
- ↑ "10 Amazing Herbs for Good Eye Care" , www.arizonaretinalspecialists.com , Retrieved 1-6-2019. Edited.
- ↑ "Age-Related Eye Diseases" , nei.nih.gov , Retrieved 1-6-2019. Edited.
- ↑ "Common Eye Disorders" , www.cdc.gov , Retrieved 1-6-2019. Edited.