We do not only cry when we are sad: we continuously produce tears to moisten our eyes constantly, to clean them and protect them from foreign bodies. These tears or tear film is a complex mixture of water, fatty acids, proteins, electrolytes, and antibacterial substances. This mixture keeps the surface of the eye clean and clear and prevents infections. Without […]
The uveitis is inflammation of part or all of the uvea. It can cause redness in the eye. The uvea, which lies in the middle layer, ie in the center of the eye, is composed of the iris, the choroid, a membrane that irrigates the retina, and the ciliary body. The iris is the colored part of the eye around the pupil that controls how much […]
What is it? Toxocariasis is a cosmopolitan parasitic infection. It concerns more particularly children and is caused by the parasite: Toxocara. Different species of this parasite exist according to the host hope: – T. canes, in the dog; – T. cacti, in the cat. This is a zoonosis. Either a disease transmitted from the animal to the man. The parasite thus contaminates […]
Strabismus affects about 4% of the population. It corresponds to an abnormal deviation of one eye: strabismus is said to converge when the eye is deflected inwards towards the nose. This is the most common form of strabismus: twice when strabismus diverges, when the eye is deflected outwards. As for vertical strabismus with the deviation of an eye […]
Retinoblastoma is an eye disease. It is a rare cancer of the retina. It develops in young children, usually before their fifth birthday. Definition of retinoblastoma Retinoblastoma is a type of eye cancer that affects young children (usually under the age of five). This type of cancer is rare and is treated in its entirety (in 95% […]
What is it ? Retinitis pigmentosa is a rare disease characterized by degeneration in the cells of the retina (part of the eye sensitive to light) that can cause a loss of vision or blindness. It is a genetic disease whose prevalence (number of cases of the disease in a given population at a given […]
What is it ? Presbyopia is a progressive loss of the ability of the eye to the “development” (or accommodation ) on a near object. In case of presbyopia, the visual acuity of close down. Presbyopia, related to age, is a normal process of aging of the eye. It is due to hardening of the lens and a limitation of the system acting […]
What is it ? Photophobia is characterized by increased sensitivity to light or even complete intolerance to it. Light, even of low intensity, can cause visual discomfort, eye problems (dry eyes, pain), migraines, etc. The genes caused by light cause the eyes to fold in sensitive persons, or even to close them completely when the sensitivity is […]
Definition of stye A stye is a benign infection that forms in a few days at the edge of the eyelid. A small, painful red button appears at the base of the eyelashes and fills with pus. A stye is not harmful to the eye and is not contagious. The infection usually goes away by itself after about a week. Causes of stye […]
Nystagmus is an involuntary rhythmic oscillatory movement of both eyes or much more rarely of one eye. There are two kinds of nystagmus: the pendulous nystagmus, made of sinusoidal oscillations of identical speed and spring nystagmus which has a slow phase alternating with a rapid phase of correction In the vast majority of cases, the […]