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 […]
Myopia: what is it? The myopia is not a disease but a vision disorder that is characterized by a sharp near vision but a vision blurred from afar . Affecting about one-third of adults in Europe and North America, myopia is the most common visual defect, and its prevalence is increasing. It usually appears at school age (in childhood or adolescence) and evolves to early adulthood, […]
What is it ? Wilson’s disease is an inherited genetic disease that prevents the body’s elimination of copper. The accumulation of copper in the liver and brain causes liver or neurological disorders. The prevalence of Wilson’s disease is very low, about 1 in 30,000 people. There is an effective treatment for this disease, but its early diagnosis […]
Keratitis is an infection of the cornea, an outer membrane covering the eye. This ocular infection is usually related to the wearing of contact lenses. Nevertheless, an impact received at the level of the eye can also lead to such an infection. Definition of keratitis The eye can often be damaged by objects, dust, and others. The cornea, […]
Hyperopia is a common visual defect that blurs near vision. It is not an illness. This defect is part of refractive disorders, such as astigmatism or myopia. The eye of a hypermetropic person is sometimes called “too small” or “too short”, although it is not always the size of the eye that is questioned. This vision disorder may be due to […]
The Glaucoma is an eye disease that causes irreversible reduction of vision. It is the consequence of damage to the optic nerve. It is primarily the peripheral vision that is affected (see images below). The sufferer can become blind if he does not receive any treatment. Glaucoma is also the cause of blindness in the world in the least developed countries in the world after cataract (source […]
As its name suggests, macular degeneration results from the deterioration of the macula , a small area of the retina located at the back of the eye , near the optic nerve. It is from this part of the retina that the best visual acuity comes. Macular degeneration leads to a progressive and sometimes significant loss of central vision , which becomes increasingly blurred. Macular degeneration mainly affects people […]
The chalazion is defined by the formation of a cyst at the level of the eyelid. This cyst is usually innocuous, and painless. Definition of chalazion: The chalazion is characterized by the formation of a cyst (area of swelling of a tissue containing fluid) at the level of the eyelid. This cyst is usually not painful, […]
The conjunctivitis is a disorder of the eye very common. It is an inflammation of the conjunctiva, a transparent layer of cells covering the entire surface of the eye, including the inside of the eyelid. Inflammation gives a red-eye appearance by diffuse irritation of the conjunctiva. Causes of conjunctivitis Conjunctivitis may be of infectious origin, linked to a microorganism. It can be a virus […]
Blindness is the loss of visual abilities, partial or total. The early identification of blindness and its rapid management makes it possible to limit possible complications. Definition of blindness Blindness is a disorder of vision, characterized by visual impairment. This deficiency is more or less consistent. The total loss of visual ability can be related to it. Currently, […]